feat: KeyValuePairs update pair label to ReactNode

[ernst-dev]

Description

Update the label property to support ReactNode for custom components such as adding icons to the labels.

Related links, issue #, if available: n/a
AWSUI-55326
08LJAUcYhg64

How has this been tested?

Manual, unit

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

All modified and coverable lines are covered by tests ✅

Project coverage is 96.51%. Comparing base (058c6ee) to head (e27a2ea).

Additional details and impacted files

@@           Coverage Diff            @@
##             main    #3430    +/-   ##
========================================
  Coverage   96.51%   96.51%            
========================================
  Files         806      806            
  Lines       23032    23032            
  Branches     7551     7973   +422     
========================================
  Hits        22230    22230            
+ Misses        795      748    -47     
- Partials        7       54    +47     

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[orangevolon]

I think we could take these three to the pemutations file and keep a simple one (the first one for example) in this file.

[ernst-dev]

Moved them over