fix: drilling on the categorical xaxis on the mixed chart

[zhaoyongjie]

SUMMARY

Same as PR, fix the Mixed Chart, for review convenience so split it into two PRs.

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

[michael-s-molina]

LGTM

[codecov]

Codecov Report

Merging #21845 (3acd48f) into master (f41d0b0) will decrease coverage by 0.00%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master   #21845      +/-   ##
==========================================
- Coverage   66.82%   66.82%   -0.01%     
==========================================
  Files        1805     1805              
  Lines       69070    69074       +4     
  Branches     7373     7378       +5     
==========================================
  Hits        46159    46159              
- Misses      21005    21009       +4     
  Partials     1906     1906              

Flag	Coverage Δ
javascript	53.32% <0.00%> (-0.01%)	⬇️

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

Impacted Files	Coverage Δ
...rts/src/MixedTimeseries/EchartsMixedTimeseries.tsx	0.00% <0.00%> (ø)
...hart-echarts/src/MixedTimeseries/transformProps.ts	0.00% <ø> (ø)
.../plugin-chart-echarts/src/MixedTimeseries/types.ts	100.00% <ø> (ø)

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