[MD] Expose a few properties for customize the appearance of the data source selector component

[BionIT]

Description

This change exposes a few properties like

• defaultOption: the defaulted selected option when the component renders
• placeholderText: the place holder text when the selected option is cleared, default is Select a data source
• removePrepend: whether there will be a prepend
• filterFn: the function that will be used to filter the data source options
• compressed

Issues Resolved

Fixes #5992

Screenshot

customizepicker.mp4

Testing the changes

The following steps are performed in the recording above:

1. enable data source plugin
2. go to add sample data and data source picker should render correctly and import sample data from a data source should be successful, going to the dashboard, it should render correctly
3. go to dev tools and data source picker should render correctly and query against a data source should return results
4. go to add sample data to check the options without filtering, it should show the data source named noauth2
5. go to query workbench plugin to check the options with filter to remove noauth2, and it should not show data source named noauth2, query using the selected data source is successful
6. go to search relevance plugin to check the removePrepend which is true and means no prepend should show, and defaultOption which is empty thus placeholder text should show

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

Attention: Patch coverage is 75.00000% with 5 lines in your changes are missing coverage. Please review.

Project coverage is 67.13%. Comparing base (8839256) to head (e96af18).
Report is 1 commits behind head on main.

Files	Patch %	Lines
...ents/data_source_selector/data_source_selector.tsx	70.58%	0 Missing and 5 partials ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #6057   +/-   ##
=======================================
  Coverage   67.13%   67.13%           
=======================================
  Files        3318     3318           
  Lines       64021    64037   +16     
  Branches    10256    10266   +10     
=======================================
+ Hits        42981    42992   +11     
  Misses      18548    18548           
- Partials     2492     2497    +5     

Flag	Coverage Δ
Linux_1	31.63% <ø> (ø)
Linux_2	55.20% <ø> (ø)
Linux_3	44.60% <75.00%> (+0.01%)	⬆️
Linux_4	35.14% <0.00%> (-0.02%)	⬇️
Windows_1	31.65% <ø> (ø)
Windows_2	55.17% <ø> (ø)
Windows_3	44.61% <75.00%> (+0.01%)	⬆️
Windows_4	35.14% <0.00%> (-0.02%)	⬇️

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