fix(cubesql): Break cost symmetry for (non)-push-to-Cube WrappedSelect

[mcheshkov]

Check List

• Tests have been run in packages where changes made if available
• Linter has been run for changed code
• Tests for the changes have been added if not covered yet
• Docs have been added / updated if required

Description of Changes Made (if issue reference is not provided)

Break symmetry for pust-to-Cube vs non-push-to-Cube plans, and test pushed members count on simple query.

Consider this query:

SELECT
    CAST(dim_date0 AS DATE) AS "dim_date0"
FROM
    MultiTypeCube
LIMIT 10
;

It can be represented with these two wrapper plans:

Without changes in cost both of those would have the same cost:

CubePlanCost {
    replacers: 0,
    table_scans: 0,
    empty_wrappers: 0,
    non_detected_cube_scans: 0,
    unwrapped_subqueries: 0,
    member_errors: 0,
    ungrouped_aggregates: 0,
    non_pushed_down_window: 0,
    non_pushed_down_grouping_sets: 0,
    non_pushed_down_limit_sort: 0,
    joins: 0,
    wrapper_nodes: 1,
    ast_size_outside_wrapper: 0,
    wrapped_select_ungrouped_scan: 1,
    filters: 0,
    structure_points: 0,
    filter_members: 0,
    zero_members_wrapper: 1,
    cube_members: 0,
    errors: 0,
    time_dimensions_used_as_dimensions: 0,
    max_time_dimensions_granularity: 0,
    cube_scan_nodes: 1,
    ast_size_without_alias: 38,
    ast_size: 40,
    ast_size_inside_wrapper: 1,
    ungrouped_nodes: 1,
}

Which one of those will get executed is implementation defined, and right now top-down and bottom-up cost choose different plans.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 83.18%. Comparing base (9a73857) to head (d509852).
Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #9155   +/-   ##
=======================================
  Coverage   83.17%   83.18%           
=======================================
  Files         226      226           
  Lines       80096    80138   +42     
=======================================
+ Hits        66620    66662   +42     
  Misses      13476    13476           

Flag	Coverage Δ
cubesql	83.18% <100.00%> (+<0.01%)	⬆️

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