feat: Allow more drawer properties to be updated in the runtime API

[just-boris]

Description

Make this work: awsuiPlugins.appLayout.updateDrawer({ id: 'my-drawer', defaultActive: true })

Use-case – teams want to remember the current active state, so their drawer reopens when re-mounting.

Also made orderPriority and onResize updatable as well. Not needed by the current use-case, but looks future proof

Related links, issue #, if available: n/a

How has this been tested?

Added an extra unit test

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 96.30%. Comparing base (9ab7368) to head (b03c46c).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2979      +/-   ##
==========================================
- Coverage   96.30%   96.30%   -0.01%     
==========================================
  Files         777      777              
  Lines       21878    21874       -4     
  Branches     7481     7068     -413     
==========================================
- Hits        21070    21066       -4     
- Misses        755      800      +45     
+ Partials       53        8      -45     

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