Revert "Bump to xcode 17 and 18_2 for simulators"

This reverts commit 3550e3c7a71fd0ab75725ed060a4d738d08b0fca.

Reason for revert: AVAudioSessionCategoryOptionAllowBluetooth is deprecated, webrtc:441899928

Bug: chromium:441889296
Original change's description:
> Bump to xcode 17 and 18_2 for simulators
>
> Bug: chromium:441889296
> Change-Id: I21c3e1f3866113363f214ee3a80660316e767129
> Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/407040
> Reviewed-by: Jeremy Leconte <jleconte@google.com>
> Commit-Queue: Jeremy Leconte <jleconte@google.com>
> Auto-Submit: Christoffer Dewerin <jansson@webrtc.org>
> Cr-Commit-Position: refs/heads/main@{#45483}

Bug: chromium:441889296
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Change-Id: Ic34b1624651778d4c7f784dc7b70003b505ba131
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/407041
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Commit-Queue: Christoffer Dewerin <jansson@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#45486}