refactor: Organizes the Select files

[michael-s-molina]

SUMMARY

Organizes the Select files. No functional changes.

• Extracts types to a types.ts file
• Extracts styles to a styles.tsx file
• Extracts the async stories to its own file

@cccs-RyanK

TESTING INSTRUCTIONS

1 - Execute all tests
2 - All tests should pass

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 #21589 (6a19e26) into master (5d51555) will increase coverage by 0.00%.
The diff coverage is 74.11%.

❗ Current head 6a19e26 differs from pull request most recent head 8f041ea. Consider uploading reports for the commit 8f041ea to get more accurate results

@@           Coverage Diff           @@
##           master   #21589   +/-   ##
=======================================
  Coverage   66.65%   66.66%           
=======================================
  Files        1794     1796    +2     
  Lines       68692    68709   +17     
  Branches     7308     7311    +3     
=======================================
+ Hits        45789    45804   +15     
- Misses      21035    21043    +8     
+ Partials     1868     1862    -6     

Flag	Coverage Δ
javascript	52.92% <74.62%> (+0.10%)	⬆️
mysql	?
sqlite	?

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

Impacted Files	Coverage Δ
...d/packages/superset-ui-chart-controls/src/index.ts	100.00% <ø> (ø)
...chart-controls/src/shared-controls/dndControls.tsx	58.33% <ø> (+4.76%)	⬆️
...src/BigNumber/BigNumberWithTrendline/buildQuery.ts	0.00% <0.00%> (ø)
.../BigNumber/BigNumberWithTrendline/controlPanel.tsx	16.66% <0.00%> (-8.34%)	⬇️
...set-frontend/src/components/Select/AsyncSelect.tsx	87.70% <ø> (-0.27%)	⬇️
superset-frontend/src/components/Select/Select.tsx	92.55% <ø> (ø)
superset-frontend/src/components/Select/utils.tsx	81.48% <ø> (+5.39%)	⬆️
...e/components/controls/SelectAsyncControl/index.tsx	54.83% <ø> (ø)
...lUtils/getControlValuesCompatibleWithDatasource.ts	8.00% <0.00%> (+0.30%)	⬆️
superset-frontend/src/views/components/SubMenu.tsx	86.88% <ø> (ø)
... and 31 more

📣 We’re building smart automated test selection to slash your CI/CD build times. Learn more

[ktmud]

Nice cleanup!