fix(plugin-chart-echarts): normalize temporal string groupbys

[villebro]

SUMMARY

#23339 introduced the possibility of normalizing non-UTC timestamps so that they produced correctly formatted timestamps. However, the normalizer wasn't being used in the ECharts plugin, causing string based non-timezone timestamps to display incorrectly when used as a groupby.

This adds a call to the normalizeTimestamp util in formatSeriesName to ensure that string based timestamps are normalized prior to being fed to the timestamp formatter.

AFTER

Now the timestamp is formatted correctly:

BEFORE

Previously the timestamp was assumed to be in local timezone, causing the formatted timestamp to be offset by the UTC offset (this was run in UTC+0200):

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

[villebro]

bycatch: the getLegendProps block was incorrectly nested inside the formatSeriesName block - check with "Hide whitespace" to see the relevant changes.

[codecov]

Codecov Report

Merging #24134 (381e255) into master (6b54591) will decrease coverage by 0.02%.
The diff coverage is 85.86%.

❗ Current head 381e255 differs from pull request most recent head 48b36ee. Consider uploading reports for the commit 48b36ee to get more accurate results

@@            Coverage Diff             @@
##           master   #24134      +/-   ##
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- Coverage   68.27%   68.26%   -0.02%     
==========================================
  Files        1952     1952              
  Lines       75468    75397      -71     
  Branches     8202     8204       +2     
==========================================
- Hits        51529    51472      -57     
+ Misses      21832    21819      -13     
+ Partials     2107     2106       -1     

Flag	Coverage Δ
javascript	54.68% <100.00%> (+0.01%)	⬆️

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Impacted Files	Coverage Δ
superset/datasets/commands/importers/v1/utils.py	79.41% <0.00%> (+0.77%)	⬆️
superset/db_engine_specs/databricks.py	70.92% <0.00%> (+0.49%)	⬆️
superset/db_engine_specs/snowflake.py	67.64% <0.00%> (+0.39%)	⬆️
superset/migrations/env.py	0.00% <0.00%> (ø)
superset/models/helpers.py	69.90% <0.00%> (+0.07%)	⬆️
superset/views/api.py	68.75% <0.00%> (+1.05%)	⬆️
superset/charts/api.py	86.09% <50.00%> (+0.23%)	⬆️
superset/viz.py	61.36% <50.00%> (+0.04%)	⬆️
superset/views/core.py	75.28% <86.66%> (-0.13%)	⬇️
...d/plugins/plugin-chart-echarts/src/utils/series.ts	86.93% <100.00%> (+0.64%)	⬆️
... and 42 more

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[eschutho]

Removing this PR from 2.1 since normalize non-iso timestamps is is not in 2.1.0