[Multiple Datasource] Fix data source filter bug and add tests

[BionIT]

Description

This change fixes the bug for data source filter, rename the filter function, and added type for the datasource object

Issues Resolved

Fixes #6151

Screenshot

fixbugfilter.mp4

Testing the changes

The following steps were performed in the recording:

1. enable data source plugin
2. go to add sample data page, and data source selector renders correctly with all available options
3. go to dev tools, and data source selector renders correctly with all available options
4. go to search relevance, and data source selector renders correctly with all available options
5. add filter function in search relevance remove all data sources, and should show local cluster option only

Check List

• All tests pass
  • yarn test:jest
  • yarn test:jest_integration
• New functionality includes testing.
• New functionality has been documented.
• Update CHANGELOG.md
• Commits are signed per the DCO using --signoff

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 67.18%. Comparing base (31e8481) to head (16d6032).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6152      +/-   ##
==========================================
- Coverage   67.20%   67.18%   -0.02%     
==========================================
  Files        3328     3328              
  Lines       64461    64460       -1     
  Branches    10376    10375       -1     
==========================================
- Hits        43318    43306      -12     
- Misses      18610    18622      +12     
+ Partials     2533     2532       -1     

Flag	Coverage Δ
Linux_1	31.74% <ø> (ø)
Linux_2	55.29% <ø> (ø)
Linux_3	44.76% <100.00%> (-0.02%)	⬇️
Linux_4	35.05% <0.00%> (+<0.01%)	⬆️
Windows_1	31.77% <ø> (-0.03%)	⬇️
Windows_2	55.26% <ø> (ø)
Windows_3	44.78% <100.00%> (+<0.01%)	⬆️
Windows_4	35.05% <0.00%> (+<0.01%)	⬆️

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