chore: Improves D2D loading indicator

[michael-s-molina]

SUMMARY

Improves Drill to Detail loading indicator to show only one spinner when bootstrapping.

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

Screen.Recording.2022-10-21.at.9.40.21.AM.mov

Screen.Recording.2022-10-21.at.9.41.19.AM.mov

TESTING INSTRUCTIONS

Check the videos for instructions.

ADDITIONAL INFORMATION

• Has associated issue:
• Required feature flags:
• Changes UI
• Includes DB Migration (follow approval process in SIP-59)
  • Migration is atomic, supports rollback & is backwards-compatible
  • Confirm DB migration upgrade and downgrade tested
  • Runtime estimates and downtime expectations provided
• Introduces new feature or API
• Removes existing feature or API

[geido]

LGTM! Thanks for the fix!

[codyml]

LGTM! Tried some error states and they look fine:

[codecov]

Codecov Report

Merging #21908 (2499fca) into master (40f8254) will decrease coverage by 0.00%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master   #21908      +/-   ##
==========================================
- Coverage   66.91%   66.91%   -0.01%     
==========================================
  Files        1807     1807              
  Lines       69147    69141       -6     
  Branches     7395     7394       -1     
==========================================
- Hits        46273    46268       -5     
+ Misses      20964    20963       -1     
  Partials     1910     1910              

Flag	Coverage Δ
javascript	53.33% <100.00%> (-0.01%)	⬇️

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

Impacted Files	Coverage Δ
...c/components/Chart/DrillDetail/DrillDetailPane.tsx	82.71% <100.00%> (+0.43%)	⬆️
...ntend/src/components/MetadataBar/ContentConfig.tsx	85.00% <0.00%> (-5.00%)	⬇️
...perset-frontend/src/views/CRUD/chart/ChartList.tsx	55.03% <0.00%> (-1.58%)	⬇️
...ackages/superset-ui-core/src/utils/featureFlags.ts	100.00% <0.00%> (ø)
...rc/explore/components/ExploreChartHeader/index.jsx	55.76% <0.00%> (ø)
...mponents/useExploreAdditionalActionsMenu/index.jsx	63.41% <0.00%> (+0.76%)	⬆️

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