[Backport 2.x] [Multiple Datasource] Expose filterfn in datasource menu component to allow filter data sources before rendering in navigation bar

[opensearch-trigger-bot]

Backport 45096bb from #6113.

[codecov]

Codecov Report

Attention: Patch coverage is 90.00000% with 1 lines in your changes are missing coverage. Please review.

Project coverage is 67.26%. Comparing base (1ef53d0) to head (219b937).

Files	Patch %	Lines
...onents/data_source_menu/data_source_selectable.tsx	90.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##              2.x    #6261      +/-   ##
==========================================
+ Coverage   67.24%   67.26%   +0.01%     
==========================================
  Files        3338     3338              
  Lines       64628    64634       +6     
  Branches    10341    10344       +3     
==========================================
+ Hits        43462    43476      +14     
+ Misses      18654    18646       -8     
  Partials     2512     2512              

Flag	Coverage Δ
Linux_1	31.30% <ø> (ø)
Linux_2	55.39% <ø> (ø)
Linux_3	44.73% <90.00%> (+0.03%)	⬆️
Linux_4	35.26% <0.00%> (-0.01%)	⬇️
Windows_1	31.33% <ø> (ø)
Windows_2	55.35% <ø> (ø)
Windows_3	44.73% <90.00%> (+0.02%)	⬆️
Windows_4	35.26% <0.00%> (-0.01%)	⬇️

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