chore: add type checking in plugin's test directory

[stephenLYZ]

SUMMARY

This PR add type checking in plugin's plugin's test directory

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

before

after

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

cc @zhaoyongjie

[zhaoyongjie]

Thanks for addressing type checking! LGTM

[codecov]

Codecov Report

Merging #19387 (9e3c3e5) into master (5ae7e54) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master   #19387   +/-   ##
=======================================
  Coverage   66.48%   66.48%           
=======================================
  Files        1670     1670           
  Lines       63952    63952           
  Branches     6506     6506           
=======================================
  Hits        42519    42519           
  Misses      19747    19747           
  Partials     1686     1686           

Flag	Coverage Δ
javascript	51.32% <ø> (ø)

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

Impacted Files	Coverage Δ
...uperset-ui-core/src/query/types/AnnotationLayer.ts	100.00% <ø> (ø)
.../plugins/plugin-chart-echarts/src/BoxPlot/types.ts	0.00% <ø> (ø)
...d/plugins/plugin-chart-echarts/src/Funnel/types.ts	100.00% <ø> (ø)
...nd/plugins/plugin-chart-echarts/src/Gauge/types.ts	100.00% <ø> (ø)
...tend/plugins/plugin-chart-echarts/src/Pie/types.ts	100.00% <ø> (ø)
...ugins/plugin-chart-echarts/src/Timeseries/types.ts	100.00% <ø> (ø)
.../plugins/plugin-chart-echarts/src/Treemap/types.ts	100.00% <ø> (ø)
...plugins/plugin-chart-echarts/src/utils/forecast.ts	94.82% <ø> (ø)

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