docs(userspace/libsinsp/filter/parser): update grammar doc

[leogr]

What type of PR is this?

Uncomment one (or more) /kind <> lines:

/kind bug

/kind cleanup

/kind design

/kind documentation

/kind failing-test

/kind feature

Any specific area of the project related to this PR?

Uncomment one (or more) /area <> lines:

/area API-version

/area build

/area CI

/area driver-kmod

/area driver-bpf

/area driver-modern-bpf

/area libscap-engine-bpf

/area libscap-engine-gvisor

/area libscap-engine-kmod

/area libscap-engine-modern-bpf

/area libscap-engine-nodriver

/area libscap-engine-noop

/area libscap-engine-source-plugin

/area libscap-engine-savefile

/area libscap

/area libpman

/area libsinsp

/area tests

/area proposals

Does this PR require a change in the driver versions?

/version driver-API-version-major

/version driver-API-version-minor

/version driver-API-version-patch

/version driver-SCHEMA-version-major

/version driver-SCHEMA-version-minor

/version driver-SCHEMA-version-patch

What this PR does / why we need it:

I just added missing operators and alphabetically sorted them.

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:
/milestone 0.20.0
cc @jasondellaluce @LucaGuerra @FedeDP

Does this PR introduce a user-facing change?:

NONE

[FedeDP]

/approve
Thank you very much!

[FedeDP]

Uh there is a conflict :/

[github-actions]

Perf diff from master - unit tests

     8.93%     -0.73%  [.] sinsp_evt::get_type
     9.52%     +0.65%  [.] sinsp_parser::reset
     1.22%     +0.39%  [.] libsinsp::sinsp_suppress::process_event
     3.16%     -0.30%  [.] sinsp_parser::process_event
     0.86%     -0.28%  [.] std::_Hashtable<conversion_key, std::pair<conversion_key const, conversion_info>, std::allocator<std::pair<conversion_key const, conversion_info> >, std::__detail::_Select1st, std::equal_to<conversion_key>, std::hash<conversion_key>, std::__detail::_Mod_range_hashing, std::__detail::_Default_ranged_hash, std::__detail::_Prime_rehash_policy, std::__detail::_Hashtable_traits<true, false, true> >::_M_find_before_node
     1.11%     +0.27%  [.] std::_Hashtable<unsigned long, std::pair<unsigned long const, std::shared_ptr<ppm_evt_hdr> >, std::allocator<std::pair<unsigned long const, std::shared_ptr<ppm_evt_hdr> > >, std::__detail::_Select1st, std::equal_to<unsigned long>, std::hash<unsigned long>, std::__detail::_Mod_range_hashing, std::__detail::_Default_ranged_hash, std::__detail::_Prime_rehash_policy, std::__detail::_Hashtable_traits<false, false, true> >::_M_find_before_node
     3.56%     -0.26%  [.] sinsp_evt::load_params
     6.02%     -0.26%  [.] next_event_from_file
     1.02%     -0.24%  [.] std::_Sp_counted_base<(__gnu_cxx::_Lock_policy)2>::_M_release
     1.33%     +0.24%  [.] sinsp::fetch_next_event

Heap diff from master - unit tests

peak heap memory consumption: -5.18K
peak RSS (including heaptrack overhead): 0B
total memory leaked: 0B

Heap diff from master - scap file

peak heap memory consumption: 0B
peak RSS (including heaptrack overhead): 0B
total memory leaked: 0B

Benchmarks diff from master

Comparing gbench_data.json to /root/actions-runner/_work/libs/libs/build/gbench_data.json
Benchmark                                                         Time             CPU      Time Old      Time New       CPU Old       CPU New
----------------------------------------------------------------------------------------------------------------------------------------------
BM_sinsp_split_mean                                            +0.0160         +0.0160           148           151           148           151
BM_sinsp_split_median                                          +0.0131         +0.0132           148           150           148           150
BM_sinsp_split_stddev                                          +1.1751         +1.1751             1             2             1             2
BM_sinsp_split_cv                                              +1.1408         +1.1408             0             0             0             0
BM_sinsp_concatenate_paths_relative_path_mean                  +0.0357         +0.0357            57            59            57            59
BM_sinsp_concatenate_paths_relative_path_median                +0.0345         +0.0346            57            59            57            59
BM_sinsp_concatenate_paths_relative_path_stddev                +1.0681         +1.0717             0             0             0             0
BM_sinsp_concatenate_paths_relative_path_cv                    +0.9969         +1.0003             0             0             0             0
BM_sinsp_concatenate_paths_empty_path_mean                     -0.0136         -0.0136            25            25            25            25
BM_sinsp_concatenate_paths_empty_path_median                   -0.0130         -0.0130            25            25            25            25
BM_sinsp_concatenate_paths_empty_path_stddev                   -0.3887         -0.3883             0             0             0             0
BM_sinsp_concatenate_paths_empty_path_cv                       -0.3802         -0.3799             0             0             0             0
BM_sinsp_concatenate_paths_absolute_path_mean                  +0.1353         +0.1353            56            63            56            63
BM_sinsp_concatenate_paths_absolute_path_median                +0.1330         +0.1331            56            63            56            63
BM_sinsp_concatenate_paths_absolute_path_stddev                +2.0941         +2.0887             0             1             0             1
BM_sinsp_concatenate_paths_absolute_path_cv                    +1.7254         +1.7207             0             0             0             0
BM_sinsp_split_container_image_mean                            -0.0022         -0.0021           391           390           391           390
BM_sinsp_split_container_image_median                          -0.0024         -0.0024           390           389           390           389
BM_sinsp_split_container_image_stddev                          +0.5606         +0.5604             3             4             3             4
BM_sinsp_split_container_image_cv                              +0.5639         +0.5638             0             0             0             0

[FedeDP]

/approve

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 75.11%. Comparing base (bceb3b1) to head (1769e54).
Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #2237   +/-   ##
=======================================
  Coverage   75.11%   75.11%           
=======================================
  Files         276      276           
  Lines       34395    34395           
  Branches     5923     5923           
=======================================
  Hits        25836    25836           
  Misses       8559     8559           

Flag	Coverage Δ
libsinsp	75.11% <ø> (ø)

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[Andreagit97]

/approve

[poiana]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Andreagit97, FedeDP, leogr

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