[Backport 2.x] [Discover-next] query editor and UI settings toggle

[opensearch-trigger-bot]

Backport a4aa682 from #7001.

Changelog

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[github-actions]

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[codecov]

Codecov Report

Attention: Patch coverage is 55.86207% with 64 lines in your changes missing coverage. Please review.

Project coverage is 67.55%. Comparing base (7674d3c) to head (ea7f4c4).
Report is 1 commits behind head on 2.x.

Files	Patch %	Lines
src/plugins/data/public/ui/settings/settings.ts	33.33%	16 Missing and 2 partials ⚠️
...c/plugins/data/public/ui/search_bar/search_bar.tsx	47.61%	6 Missing and 5 partials ⚠️
.../data_explorer/public/components/sidebar/index.tsx	52.38%	8 Missing and 2 partials ⚠️
.../data/public/ui/query_editor/language_selector.tsx	59.09%	8 Missing and 1 partial ⚠️
src/plugins/data/public/ui/ui_service.ts	0.00%	4 Missing ⚠️
...public/ui/query_string_input/language_switcher.tsx	78.57%	3 Missing ⚠️
...ns/data/public/ui/search_bar/create_search_bar.tsx	0.00%	3 Missing ⚠️
src/plugins/data/public/ui/query_editor/index.tsx	71.42%	2 Missing ⚠️
src/plugins/data/public/plugin.ts	0.00%	1 Missing ⚠️
src/plugins/data/public/ui/mocks.ts	0.00%	1 Missing ⚠️
... and 2 more

Additional details and impacted files

@@            Coverage Diff             @@
##              2.x    #7028      +/-   ##
==========================================
- Coverage   67.56%   67.55%   -0.01%     
==========================================
  Files        3441     3443       +2     
  Lines       67805    67854      +49     
  Branches    11017    11017              
==========================================
+ Hits        45810    45842      +32     
- Misses      19333    19353      +20     
+ Partials     2662     2659       -3     

Flag	Coverage Δ
Linux_1	33.09% <25.00%> (-0.01%)	⬇️
Linux_2	55.23% <ø> (ø)
Linux_3	45.23% <55.55%> (+0.02%)	⬆️
Linux_4	35.03% <27.02%> (-0.01%)	⬇️
Windows_1	33.11% <25.00%> (-0.01%)	⬇️
Windows_2	55.18% <ø> (ø)
Windows_3	45.25% <55.55%> (+0.02%)	⬆️
Windows_4	35.03% <27.02%> (-0.01%)	⬇️

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