feat: Make clear buttons keyboard-accessible

[avinashbot]

Description

• Added clearAriaLabel (or variations in context, like filteringClearAriaLabel and inContextInputClearAriaLabel) to all components that use a search input.
• Restored the tab stop for clear buttons.

Review checklist

The following items are to be evaluated by the author(s) and the reviewer(s).

Correctness

• Changes include appropriate documentation updates.
• Changes are backward-compatible if not indicated, see CONTRIBUTING.md.
• Changes do not include unsupported browser features, see CONTRIBUTING.md.
• Changes were manually tested for accessibility, see accessibility guidelines.

Security

• If the code handles URLs: all URLs are validated through the checkSafeUrl function.

Testing

• Changes are covered with new/existing unit tests?
• Changes are covered with new/existing integration tests?

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[codecov]

Codecov Report

Base: 92.97% // Head: 92.97% // Increases project coverage by +0.00% 🎉

Coverage data is based on head (e11f166) compared to base (d52870f).
Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #475   +/-   ##
=======================================
  Coverage   92.97%   92.97%           
=======================================
  Files         574      574           
  Lines       16766    16769    +3     
  Branches     4628     4627    -1     
=======================================
+ Hits        15588    15591    +3     
  Misses       1101     1101           
  Partials       77       77           

Impacted Files	Coverage Δ
src/autosuggest/internal.tsx	95.23% <ø> (ø)
src/property-filter/token-editor.tsx	98.13% <ø> (ø)
src/tag-editor/index.tsx	90.81% <ø> (ø)
src/input/index.tsx	100.00% <100.00%> (ø)
src/input/internal.tsx	100.00% <100.00%> (ø)
...rc/internal/components/autosuggest-input/index.tsx	95.27% <100.00%> (+0.03%)	⬆️
src/multiselect/internal.tsx	97.50% <100.00%> (+0.02%)	⬆️
src/s3-resource-selector/s3-in-context/index.tsx	100.00% <100.00%> (ø)
src/select/internal.tsx	96.34% <100.00%> (+0.04%)	⬆️
src/tag-editor/internal.tsx	87.14% <100.00%> (+0.18%)	⬆️
... and 2 more

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[Cooperbuilt]

Hey! This could be a big win for a11y in Cloudscape. Is there anything I can do to help get it over the finish line?