[CI] Stop Xcode 14, start Xcode 15.3 #586

Job	Run time
catalyst	1m 54s
diagnostics (tsan)	6m 49s
pod_lib_lint (FirebaseAppCheckInterop.podspec, ios, macos-14)	1m 0s
diagnostics (asan)	8m 51s
spm (iOS, macos-14)	8m 37s
pod_lib_lint (FirebaseAppCheckInterop.podspec, ios, macos-13)	1m 58s
diagnostics (ubsan)	3m 23s
spm (iOS, macos-13)	6m 0s
pod_lib_lint (FirebaseAppCheckInterop.podspec, tvos, macos-14)	59s
spm (tvOS, macos-14)	2m 20s
pod_lib_lint (FirebaseAppCheckInterop.podspec, tvos, macos-13)	1m 46s
pod_lib_lint (FirebaseAppCheckInterop.podspec, macos --skip-tests, macos-14)	1m 4s
spm (tvOS, macos-13)	4m 24s
pod_lib_lint (FirebaseAppCheckInterop.podspec, macos --skip-tests, macos-13)	2m 31s
spm (macOS, macos-14)	1m 57s
pod_lib_lint (FirebaseAppCheckInterop.podspec, watchos, macos-14)	55s
spm (macOS, macos-13)	3m 10s
pod_lib_lint (FirebaseAppCheckInterop.podspec, watchos, macos-13)	1m 49s
pod_lib_lint (FirebaseAppCheck.podspec, ios, macos-14)	6m 16s
pod_lib_lint (FirebaseAppCheck.podspec, ios, macos-13)	23m 28s
spm (catalyst, macos-14)	1m 56s
pod_lib_lint (FirebaseAppCheck.podspec, tvos, macos-14)	2m 51s
spm (catalyst, macos-13)	3m 2s
pod_lib_lint (FirebaseAppCheck.podspec, tvos, macos-13)	5m 17s
spm (watchOS, macos-14)	3m 33s
pod_lib_lint (FirebaseAppCheck.podspec, macos --skip-tests, macos-14)	2m 14s
spm (watchOS, macos-13)	5m 12s
pod_lib_lint (FirebaseAppCheck.podspec, macos --skip-tests, macos-13)	3m 0s
pod_lib_lint (FirebaseAppCheck.podspec, watchos, macos-14)	1m 26s
pod_lib_lint (FirebaseAppCheck.podspec, watchos, macos-13)	2m 48s
app_check-cron-only	0s
	2h 0m 30s

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