Always set orientation preferences on iOS 16+

[jmagman]

Cherry-pick #38230 onto stable.

CP request at flutter/flutter#124208.

Pre-launch Checklist

• I read the Contributor Guide and followed the process outlined there for submitting PRs.
• I read the Tree Hygiene wiki page, which explains my responsibilities.
• I read and followed the Flutter Style Guide and the C++, Objective-C, Java style guides.
• I listed at least one issue that this PR fixes in the description above.
• I added new tests to check the change I am making or feature I am adding, or Hixie said the PR is test-exempt. See testing the engine for instructions on writing and running engine tests.
• I updated/added relevant documentation (doc comments with ///).
• I signed the CLA.
• All existing and new tests are passing.

If you need help, consider asking for advice on the #hackers-new channel on Discord.

[cyanglaz]

autorelease]

The old code also wasn't releasing the preference object.

[jmagman]

I actually recently caught this on the master branch in Instruments when I was looking at leaks, but I forgot to fix it there. I know it seems dumb but let's keep this matching #38230 with the leak since that's been baking awhile and we know it doesn't crash. This is a really tiny leak and I'll fix in master now 🙂

[hellohuanlin]

im surprised that it doesn't have a windowSceneGeometryPreferencesIOSWithInterfaceOrientations: method

[jmagman]

This is a really tiny leak and I'll fix in master now

#40957

[cyanglaz]

LGTM

[itsjustkevin]

@XilaiZhang did we move these web engine checks to post-submit?

[XilaiZhang]

@XilaiZhang did we move these web engine checks to post-submit?

Looks like these targets have been removed from the .ci.yaml file on main branch, so they are pending. should be ready to merge