fix: Allow interactive elements to be placed inside key of a key-value pair

[avinashbot]

Description

Putting a popover inside a key meant that the dismiss button was nested inside the <label> of the key, and clicking on that counted as clicking on the button and the popover would just reopen. I don't think we need the label here; the <dt>/<dd> already creates a relationship between the key and the value, more isn't needed here.

Related links, issue #, if available: AWSUI-61213

How has this been tested?

Just a simple element change, relying on existing tests to not fail.

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 97.14%. Comparing base (fdbe231) to head (4d3e4ca).
⚠️ Report is 4 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3845   +/-   ##
=======================================
  Coverage   97.14%   97.14%           
=======================================
  Files         844      844           
  Lines       24515    24515           
  Branches     8648     8648           
=======================================
  Hits        23815    23815           
  Misses        651      651           
  Partials       49       49           

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