feat: Adds the ECharts Sankey chart

[michael-s-molina]

SUMMARY

This PR creates the ECharts Sankey chart which visually tracks the movement and transformation of values across system stages. It also adds the chart migration logic (legacy ➡️ ECharts). Users can execute this migration using the CLI command and disable the legacy version with the VIZ_TYPE_DENYLIST configuration.

I added the minimum required controls to allow the migration but many more controls can be added in the future to improve the chart's customizability.

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

TESTING INSTRUCTIONS

Check all features.

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

[codecov]

Codecov Report

Attention: Patch coverage is 12.28070% with 50 lines in your changes missing coverage. Please review.

Project coverage is 70.32%. Comparing base (76d897e) to head (a69e9de).
Report is 356 commits behind head on master.

Files	Patch %	Lines
.../plugin-chart-echarts/src/Sankey/transformProps.ts	0.00%	38 Missing ⚠️
...gins/plugin-chart-echarts/src/Sankey/buildQuery.ts	0.00%	4 Missing ⚠️
...perset/migrations/shared/migrate_viz/processors.py	55.55%	4 Missing ⚠️
...plugins/plugin-chart-echarts/src/Sankey/Sankey.tsx	0.00%	2 Missing ⚠️
...d/plugins/plugin-chart-echarts/src/Sankey/index.ts	50.00%	1 Missing ⚠️
superset/cli/viz_migrations.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #29329      +/-   ##
==========================================
+ Coverage   60.48%   70.32%   +9.83%     
==========================================
  Files        1931     1961      +30     
  Lines       76236    78431    +2195     
  Branches     8568     8951     +383     
==========================================
+ Hits        46114    55159    +9045     
+ Misses      28017    21078    -6939     
- Partials     2105     2194      +89     

Flag	Coverage Δ
hive	48.90% <50.00%> (-0.26%)	⬇️
javascript	57.95% <4.25%> (+0.24%)	⬆️
mysql	77.28% <50.00%> (?)
postgres	77.39% <50.00%> (?)
presto	53.51% <50.00%> (-0.30%)	⬇️
python	83.74% <50.00%> (+20.25%)	⬆️
sqlite	76.85% <50.00%> (?)
unit	59.20% <50.00%> (+1.58%)	⬆️

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[justinpark]

LGTM!

[villebro]

/testenv up

[github-actions]

@villebro Ephemeral environment spinning up at http://35.161.245.38:8080. Credentials are admin/admin. Please allow several minutes for bootstrapping and startup.

[john-bodley]

Should this be:

Suggested change

	if groupby and len(groupby) > 1:
	if groupby and len(groupby) == 2:

The answer seems to be no as the form-data could actually be corrupted with three or more groupings even though only the first two are used in legacy chart.

[github-actions]

Ephemeral environment shutdown and build artifacts deleted.