Feature: Sort Index Dropdown and Implement ComboBox

[nung22]

Description

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Issues Resolved

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[codecov]

Codecov Report

Attention: Patch coverage is 50.00000% with 3 lines in your changes are missing coverage. Please review.

Project coverage is 82.95%. Comparing base (3bfbfda) to head (2f06713).

❗ Current head 2f06713 differs from pull request most recent head 813dd61. Consider uploading reports for the commit 813dd61 to get more accurate results

Files	Patch %	Lines
...search_components/search_configs/search_config.tsx	50.00%	2 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #358      +/-   ##
==========================================
- Coverage   83.13%   82.95%   -0.19%     
==========================================
  Files          32       32              
  Lines         415      393      -22     
  Branches       81       79       -2     
==========================================
- Hits          345      326      -19     
+ Misses         49       47       -2     
+ Partials       21       20       -1     

Flag	Coverage Δ
dashboards-search-relevance	82.95% <50.00%> (-0.19%)	⬇️

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[sejli]

Saw this on #342. Could we try implementing the DataSourceSelectable component instead?

cc: @ashwin-pc in case more context is needed