fix: Ignores case and special keys when searching in the Select component

[michael-s-molina]

SUMMARY

• Ignores case and special keys when searching in the Select component.
• Adds tests for the fixes.

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 #16706 (faa0fac) into master (9f5f679) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master   #16706   +/-   ##
=======================================
  Coverage   76.95%   76.95%           
=======================================
  Files        1007     1007           
  Lines       54146    54139    -7     
  Branches     7367     7366    -1     
=======================================
- Hits        41668    41665    -3     
+ Misses      12238    12234    -4     
  Partials      240      240           

Flag	Coverage Δ
javascript	71.30% <100.00%> (+<0.01%)	⬆️

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	91.76% <100.00%> (+0.09%)	⬆️
superset-frontend/src/setup/setupColors.ts	100.00% <0.00%> (+13.33%)	⬆️

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[geido]

LGTM!