chore: Writes the tests for the new Select component

[michael-s-molina]

SUMMARY

Writes the tests for the new Select component and fixes the bugs found while writing the tests.

@junlincc @rusackas

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

TESTING INSTRUCTIONS

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 #16638 (c96507a) into master (37c2020) will increase coverage by 0.09%.
The diff coverage is 88.88%.

@@            Coverage Diff             @@
##           master   #16638      +/-   ##
==========================================
+ Coverage   76.64%   76.74%   +0.09%     
==========================================
  Files        1003     1004       +1     
  Lines       53959    53971      +12     
  Branches     7330     7335       +5     
==========================================
+ Hits        41358    41418      +60     
+ Misses      12362    12314      -48     
  Partials      239      239              

Flag	Coverage Δ
javascript	71.28% <88.88%> (+0.19%)	⬆️

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

Impacted Files	Coverage Δ
superset-frontend/src/components/Select/Select.tsx	89.95% <88.88%> (+17.30%)	⬆️
superset-frontend/src/dashboard/actions/hydrate.js	1.69% <0.00%> (-0.03%)	⬇️
superset-frontend/src/SqlLab/actions/sqlLab.js	59.01% <0.00%> (ø)
...shboard/util/charts/getFormDataWithExtraFilters.ts	83.87% <0.00%> (ø)
...nd/src/explore/components/DatasourcePanel/types.ts	100.00% <0.00%> (ø)
...ontrols/DndColumnSelectControl/DndMetricSelect.tsx	41.87% <0.00%> (+0.47%)	⬆️
superset-frontend/src/components/Select/utils.ts	96.15% <0.00%> (+34.61%)	⬆️

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[villebro]

This is amazing work! ❤️ This should really help protect us against regressions and make it easier to add new features and refinements without fear of breaking existing functionality.

[villebro]

nit: some of these might look nicer by doing the ol'

Suggested change

	const firstOption = OPTIONS[0];
	const secondOption = OPTIONS[1];
	const [firstOption, secondOption] = OPTIONS;

[geido]

This is stellar work!