[Manual Backport 2.x] [MD] Able to hide "Local Cluster" option

[xinruiba]

Description

Backport from 26fc902 from #5827

Issues Resolved

Screenshot

Testing the changes

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: 7 lines in your changes are missing coverage. Please review.

Comparison is base (6923767) 67.02% compared to head (be0d22a) 67.02%.

Files	Patch %	Lines
.../plugins/index_pattern_management/public/plugin.ts	0.00%	3 Missing ⚠️
...a/server/search/opensearch_search/decide_client.ts	66.66%	0 Missing and 1 partial ⚠️
...ch/opensearch_search/opensearch_search_strategy.ts	50.00%	1 Missing ⚠️
...c/components/cluster_selector/cluster_selector.tsx	75.00%	0 Missing and 1 partial ⚠️
.../plugins/saved_objects_management/public/plugin.ts	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##              2.x    #5904      +/-   ##
==========================================
- Coverage   67.02%   67.02%   -0.01%     
==========================================
  Files        3302     3302              
  Lines       63601    63610       +9     
  Branches    10143    10147       +4     
==========================================
+ Hits        42628    42634       +6     
+ Misses      18556    18512      -44     
- Partials     2417     2464      +47     

Flag	Coverage Δ
Linux_1	35.22% <0.00%> (+<0.01%)	⬆️
Linux_2	55.15% <0.00%> (+<0.01%)	⬆️
Linux_3	43.54% <57.14%> (-0.01%)	⬇️
Linux_4	35.33% <48.00%> (+<0.01%)	⬆️
Windows_1	35.24% <0.00%> (+<0.01%)	⬆️
Windows_2	55.12% <0.00%> (+<0.01%)	⬆️
Windows_3	43.56% <57.14%> (+<0.01%)	⬆️
Windows_4	35.33% <48.00%> (+<0.01%)	⬆️

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