ci: fix get latest grafana versions python script

[Nemental]

SUMMARY

• increase number of returned releases by api to ensure the newest 3 majors are included
• refactor comparation of version numbers
  • work with multi digits major versions
  • compare versions as tulpe not as int
    • before: 10.0.13 (as_int: 10013) > 10.2.6 (as_int: 1026) (older version is higher)
    • after: 10.0.13 (as_tulpe: (10, 0, 13)) < 10.2.6 (as_tulpe: (10, 2, 6)) (newer version is higher)

ISSUE TYPE

• Bugfix Pull Request

COMPONENT NAME

ADDITIONAL INFORMATION

before:

["9.5.18", "10.0.13"]

after:

["8.5.27", "9.5.18", "10.4.1"]

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 74.46%. Comparing base (a3056e9) to head (451cc3c).
Report is 5 commits behind head on main.

❗ Current head 451cc3c differs from pull request most recent head cff474c. Consider uploading reports for the commit cff474c to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #354      +/-   ##
==========================================
+ Coverage   71.18%   74.46%   +3.28%     
==========================================
  Files          18       14       -4     
  Lines        1898     1719     -179     
  Branches      332      312      -20     
==========================================
- Hits         1351     1280      -71     
+ Misses        402      293     -109     
- Partials      145      146       +1     

Flag	Coverage Δ
integration	70.04% <ø> (ø)
sanity	?
units	65.08% <ø> (-0.11%)	⬇️

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[rrey]

I just tried to run the script and got an error:

Traceback (most recent call last):
  File "/Users/remirey/dev/ansible_collections/community/grafana/hacking/find_grafana_versions.py", line 30, in <module>
    major, version, as_tuple = get_by_major(release.get("tag_name"))
                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/remirey/dev/ansible_collections/community/grafana/hacking/find_grafana_versions.py", line 10, in get_by_major
    return int(version.split(".")[0]), version, tuple(map(int, version.split(".")))
                                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
ValueError: invalid literal for int() with base 10: '0-preview'

[Nemental]

They released a preview right after my changes to the python script :D Now all pre-release (-) and build-release tags (+) are skipped according to the semantic version

[Nemental]

failed sanity workflow is fixed in #355

[rndmh3ro]

lgtm

fixed