fix: propagate one-theme class to remaining portaled content

[Harsh-Anand-Singh]

Problem

#4599 added propagation of the awsui-one-theme class to portaled content, but some portal render points still did not receive it. When One Theme is activated on an ancestor instead of on body, those overlays render without the theme.

What this PR does

Propagates awsui-one-theme to the remaining affected portal wrappers so their overlays keep One Theme styling when rendered through document.body. The affected components are Modal, Tooltip, internal Tooltip, Drawer, AnnotationContext annotations, FeaturePrompt, the drag-handle portal overlay, and the SortableArea drag overlay.

Testing

Added focused unit coverage for each affected portal path plus the SSR placeholder check. Verified with targeted Jest suites, npm run build, and npm run lint .

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 97.66%. Comparing base (189b5ce) to head (91dceda).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #4934   +/-   ##
=======================================
  Coverage   97.66%   97.66%           
=======================================
  Files         958      958           
  Lines       31317    31328   +11     
  Branches    11565    11568    +3     
=======================================
+ Hits        30585    30596   +11     
+ Misses        725      686   -39     
- Partials        7       46   +39     

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