feat(linting): restrict direct use of supersetTheme in favor of ThemeProvider

[rusackas]

SUMMARY

This PR adds linting to restrict use of the supersetTheme from direct import/use, instead preferring useTheme or withTheme or any other direct theme usage via the ThemeProvider.

In this PR, it's set to warn, so we can sweep up (or add lint override comments) for any offending instances, and then open up another PR to put it into an error state and lock things down.

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

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

[codecov]

Codecov Report

Merging #17001 (9a7ea40) into master (cde4cdc) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master   #17001   +/-   ##
=======================================
  Coverage   76.93%   76.93%           
=======================================
  Files        1030     1030           
  Lines       55031    55031           
  Branches     7465     7465           
=======================================
  Hits        42336    42336           
  Misses      12441    12441           
  Partials      254      254           

Flag	Coverage Δ
hive	81.45% <ø> (ø)
javascript	70.90% <ø> (ø)
mysql	81.90% <ø> (ø)
postgres	81.91% <ø> (ø)
presto	81.77% <ø> (ø)
python	82.41% <ø> (ø)
sqlite	81.58% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
superset-frontend/src/preamble.ts	0.00% <ø> (ø)

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[geido]

LGTM! Thanks for the improvement!