Update CI to Xcode 15.1 #2180

Job	Run time
pod-lib-lint (ios, macos-12)	5m 41s
pod-lib-lint (ios, macos-13)	9m 47s
spm (iOS, macos-12)	4m 42s
pod-lib-lint (tvos, macos-12)	4m 11s
catalyst	3m 8s
spm (iOS, macos-13)	7m 0s
spm (tvOS, macos-12)	2m 59s
pod-lib-lint (tvos, macos-13)	4m 37s
spm (tvOS, macos-13)	5m 38s
pod-lib-lint (macos --skip-tests, macos-12)	2m 40s
spm (macOS, macos-12)	3m 16s
quickstart	7m 12s
pod-lib-lint (macos --skip-tests, macos-13)	5m 13s
spm (macOS, macos-13)	3m 39s
pod-lib-lint (watchos, macos-12)	3m 35s
spm (catalyst, macos-12)	3m 1s
pod-lib-lint (watchos, macos-13)	3m 49s
spm (catalyst, macos-13)	3m 34s
spm (watchOS, macos-12)	2m 54s
spm (watchOS, macos-13)	4m 39s
quickstart-ftl-cron-only	0s
abtesting-cron-only	0s
	1h 31m 15s

Provide feedback