fix(echarts): bring annotations in front and prevent tooltip from covering annotation labels

[madhushreeag]

SUMMARY

Data tooltip covers the annotation label and annotations render behind chart data

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

TESTING 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

[codecov]

Codecov Report

❌ Patch coverage is 70.58824% with 5 lines in your changes missing coverage. Please review.
✅ Project coverage is 64.31%. Comparing base (a19093e) to head (ae1c815).
⚠️ Report is 9 commits behind head on master.

Files with missing lines	Patch %	Lines
.../plugins/plugin-chart-echarts/src/utils/tooltip.ts	68.75%	5 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master   #41174   +/-   ##
=======================================
  Coverage   64.31%   64.31%           
=======================================
  Files        2652     2652           
  Lines      144807   144820   +13     
  Branches    33423    33429    +6     
=======================================
+ Hits        93126    93140   +14     
+ Misses      50013    50012    -1     
  Partials     1668     1668           

Flag	Coverage Δ
javascript	68.45% <70.58%> (+<0.01%)	⬆️

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