feat: Adds Heatmap chart migration logic

[michael-s-molina]

SUMMARY

This PR adds the Heatmap 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.

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

TESTING INSTRUCTIONS

1 - Upgrade a Heatmap chart using the CLI command
2 - Check the new chart
3 - Downgrade a Heatmap chart using the CLI command
4 - Check the legacy chart

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]

@mistercrunch The bot added the risk:db-migration label to this PR even though there's no database migration.

[codecov]

Codecov Report

Attention: Patch coverage is 87.50000% with 1 line in your changes missing coverage. Please review.

Project coverage is 69.82%. Comparing base (c0f8dfc) to head (f41df82).
Report is 1300 commits behind head on master.

Files with missing lines	Patch %	Lines
superset/cli/viz_migrations.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #27771      +/-   ##
==========================================
+ Coverage   69.71%   69.82%   +0.11%     
==========================================
  Files        1920     1920              
  Lines       75234    75242       +8     
  Branches     8423     8423              
==========================================
+ Hits        52447    52538      +91     
+ Misses      20725    20642      -83     
  Partials     2062     2062              

Flag	Coverage Δ
hive	48.93% <75.00%> (?)
mysql	77.88% <75.00%> (-0.01%)	⬇️
postgres	77.99% <75.00%> (-0.01%)	⬇️
presto	53.63% <75.00%> (?)
python	83.15% <87.50%> (+0.23%)	⬆️
sqlite	77.43% <75.00%> (-0.01%)	⬇️
unit	56.78% <87.50%> (+<0.01%)	⬆️

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[kgabryje]

LGTM

[mistercrunch]