[CI] Stop Xcode 14, start Xcode 15.3 #2997

Job	Run time
catalyst	2m 43s
quickstart	26m 53s
pod-lib-lint (ios, macos-14, --use-modular-headers)	2m 15s
pod-lib-lint (ios, macos-14)	2m 9s
spm (iOS, macos-13)	5m 41s
pod-lib-lint (ios, macos-13, --use-modular-headers)	32m 57s
spm (iOS, macos-14)	7m 34s
pod-lib-lint (ios, macos-13)	34m 19s
spm (tvOS, macos-13)	4m 3s
pod-lib-lint (tvos, macos-14, --use-modular-headers)	2m 9s
spm (tvOS, macos-14)	2m 22s
pod-lib-lint (tvos, macos-14)	2m 41s
spm (macOS, macos-13)	4m 53s
pod-lib-lint (tvos, macos-13, --use-modular-headers)	5m 48s
spm (macOS, macos-14)	2m 52s
pod-lib-lint (tvos, macos-13)	7m 6s
spm (catalyst, macos-13)	4m 5s
pod-lib-lint (macos, macos-14, --use-modular-headers)	2m 47s
spm (catalyst, macos-14)	8m 11s
pod-lib-lint (macos, macos-14)	2m 38s
spm (watchOS, macos-13)	4m 3s
pod-lib-lint (macos, macos-13, --use-modular-headers)	8m 34s
spm (watchOS, macos-14)	3m 3s
pod-lib-lint (macos, macos-13)	7m 51s
spm (macos-14, visionOS, Xcode_15.3)	2m 19s
pod-lib-lint (watchos --skip-tests, macos-14, --use-modular-headers)	2m 32s
pod-lib-lint (watchos --skip-tests, macos-14)	2m 48s
pod-lib-lint (watchos --skip-tests, macos-13, --use-modular-headers)	4m 29s
pod-lib-lint (watchos --skip-tests, macos-13)	4m 53s
quickstart-ftl-cron-only	0s
crashlytics-cron-only	0s
	3h 24m 38s

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