chore(sqllab): migrate to typescript

[justinpark]

SUMMARY

This commit migrates legacy jsx and tests to typescript

TESTING INSTRUCTIONS

npm run type and test

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: 5 lines in your changes are missing coverage. Please review.

Comparison is base (2cd7135) 67.17% compared to head (81f7470) 67.16%.

Files	Patch %	Lines
...d/src/SqlLab/components/TabbedSqlEditors/index.tsx	69.23%	1 Missing and 3 partials ⚠️
...d/src/SqlLab/components/SqlEditorLeftBar/index.tsx	75.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #26171      +/-   ##
==========================================
- Coverage   67.17%   67.16%   -0.01%     
==========================================
  Files        1899     1899              
  Lines       74354    74357       +3     
  Branches     8266     8275       +9     
==========================================
  Hits        49945    49945              
- Misses      22360    22361       +1     
- Partials     2049     2051       +2     

Flag	Coverage Δ
javascript	56.91% <73.68%> (-0.01%)	⬇️

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[rusackas]

Looking good to me so far... but boy, it's a lot to chew on, so I'll re-review before approving.

[rusackas]

Had our AI overlords take a second look at the diff and try to spot risks, and it wasn't able to find anything that seemed worrisome.

[rusackas]

@justinpark I just went for the merge button when I saw it since it looks like it was rebased twice already ;)