Support modular explorer

[mengweieric]

Description

[Describe what this change achieves]

Issues Resolved

[List any issues this PR will resolve]

Check List

• New functionality includes testing.
  • All tests pass, including unit test, integration test and doctest
• New functionality has been documented.
  • New functionality has javadoc added
  • New functionality has user manual doc added
• Commits are signed per the DCO using --signoff

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.
For more information on following Developer Certificate of Origin and signing off your commits, please check here.

[codecov-commenter]

Codecov Report

Merging #420 (8aa62f1) into application-analytics (ca4399d) will decrease coverage by 0.05%.
The diff coverage is 9.30%.

@@                     Coverage Diff                     @@
##             application-analytics     #420      +/-   ##
===========================================================
- Coverage                    59.91%   59.85%   -0.06%     
  Complexity                     273      273              
===========================================================
  Files                          203      203              
  Lines                         6915     6920       +5     
  Branches                      1355     1361       +6     
===========================================================
- Hits                          4143     4142       -1     
- Misses                        2571     2577       +6     
  Partials                       201      201              

Flag	Coverage Δ
dashboards-observability	54.03% <9.30%> (-0.08%)	⬇️
opensearch-observability	73.05% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...ervability/public/components/explorer/explorer.tsx	0.68% <0.00%> (-0.69%)	⬇️
...c/components/explorer/slices/query_result_slice.ts	40.00% <33.33%> (ø)
...ability/public/components/common/search/search.tsx	44.82% <50.00%> (-7.03%)	⬇️
...y/public/components/explorer/slices/field_slice.ts	33.33% <50.00%> (-1.97%)	⬇️
...hboards-observability/common/constants/explorer.ts	100.00% <100.00%> (ø)
...onents/explorer/slices/count_distribution_slice.ts	71.42% <100.00%> (ø)
...y/public/components/explorer/slices/query_slice.ts	42.85% <100.00%> (ø)
.../components/explorer/slices/visualization_slice.ts	55.55% <100.00%> (ø)

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