fix: Iframe case for tooltip user component

[NathanZlion]

Fix Iframe tooltip and Portal usage bugs.

Description

Related links, issue AWSUI-61932

How has this been tested?

Created Test Pages and did manual test and added Integ tests too.

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 97.40%. Comparing base (eb9e00b) to head (6e59666).
⚠️ Report is 3 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #4467   +/-   ##
=======================================
  Coverage   97.40%   97.40%           
=======================================
  Files         933      934    +1     
  Lines       29486    29501   +15     
  Branches    10698    10701    +3     
=======================================
+ Hits        28720    28735   +15     
  Misses        718      718           
  Partials       48       48           

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[jperals]

Why not let the Portal from component-toolkit use this by default? Is it not desired in general to append portal elements to the owner document instead of the child document if using an iframe?

This fix does not include feature prompt and popover, which also use Portal without arguments. Can they not be affected too? Fixing this as default behavior would address them out of the box.

[NathanZlion]

yes, I noticed the feature prompt and the popover components. Wanted to minimize the PR size and add those as a follow up to make it easy to review.

[NathanZlion]

Why not let the Portal from component-toolkit use this by default?

Interesting, I don't see any argument against that. I think that would fix every single usecase no?

[NathanZlion]

But still defaulting to ownerDocument in the toolkit like here solves only half the problem. We still have to attach scroll listener to the right document, instead of glbal window.