fix(plugin-chart-echarts): fix tick labels and tooltip

[villebro]

🐛 Bug Fix

Fixes multiple issues on the Mixed Timeseries chart:

• Tooltip x-axis value shows 0NaN when rich tooltip is disabled and the value is a decimal.
• On the case of a mixed line+bar chart, the bars below the line won't show in the tooltip.
• Remove bogus min and max x-axis values (these have been deprecated from the main Timeseries chart some time ago).

AFTER

Tooltip correctly shows the x-axis value when the y-value is a decimal:

The erroneous min and max x-axis values are removed, and hovering on a bar underneath a line works as intended:
https://user-images.githubusercontent.com/33317356/139655494-8ab0257a-2ece-4821-a41e-727437cd8490.mp4

BEFORE

Tooltip shows 0NaN when the metric value is a decimal value:

The x-axis shows incorrect min and max values, and hovering on a bar underneath a line doesn't display the bar value correctly:
https://user-images.githubusercontent.com/33317356/139655424-20628415-b6a2-46a7-81e7-fb310e894e19.mp4

[vercel]

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[codecov]

Codecov Report

Merging #1447 (5406bce) into master (6b8cda4) will decrease coverage by 0.00%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master    #1447      +/-   ##
==========================================
- Coverage   30.43%   30.43%   -0.01%     
==========================================
  Files         497      497              
  Lines       10012    10013       +1     
  Branches     1691     1692       +1     
==========================================
  Hits         3047     3047              
- Misses       6719     6720       +1     
  Partials      246      246              

Impacted Files	Coverage Δ
...rts/src/MixedTimeseries/EchartsMixedTimeseries.tsx	0.00% <0.00%> (ø)
...chart-echarts/src/MixedTimeseries/controlPanel.tsx	80.00% <ø> (ø)
...hart-echarts/src/MixedTimeseries/transformProps.ts	0.00% <0.00%> (ø)
.../plugin-chart-echarts/src/MixedTimeseries/types.ts	100.00% <ø> (ø)
...gin-chart-echarts/src/Timeseries/transformProps.ts	53.75% <0.00%> (ø)
...lugin-chart-echarts/src/Timeseries/transformers.ts	43.36% <0.00%> (-0.39%)	⬇️
...ugins/plugin-chart-echarts/src/Timeseries/types.ts	100.00% <ø> (ø)

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[stephenLYZ]

Thanks for the improvement! LGTM and just left a comment.

[zhaoyongjie]

LGTM