fix(plugin-chart-echarts): support numerical x-axis

[villebro]

SUMMARY

Currently using a numeric x-axis produces a chart with a categorical x-axis. This sets the x-axis to

AFTER

Now the x-axis is numerical:

BEFORE

Previously the x-axis was set as categorical:

TESTING INSTRUCTIONS

ADDITIONAL INFORMATION

• Has associated issue: fixes [Regression] GENERIC_CHART_AXES: numeric x-axis treated as categorical values #26034
• 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

[zhaoyongjie]

LGTM

[codecov]

Codecov Report

Attention: 2 lines in your changes are missing coverage. Please review.

Comparison is base (dd58b31) 69.07% compared to head (fd05b38) 69.07%.
Report is 23 commits behind head on master.

Files	Patch %	Lines
...gin-chart-echarts/src/Timeseries/transformProps.ts	0.00%	0 Missing and 2 partials ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master   #26087   +/-   ##
=======================================
  Coverage   69.07%   69.07%           
=======================================
  Files        1941     1941           
  Lines       75882    75885    +3     
  Branches     8443     8445    +2     
=======================================
+ Hits        52412    52416    +4     
+ Misses      21295    21294    -1     
  Partials     2175     2175           

Flag	Coverage Δ
javascript	56.28% <50.00%> (+<0.01%)	⬆️

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