[Infra] Update multiple workflows to use macOS 15 for Xcode 16 #5717

Job	Run time
pod-lib-lint (ios, macos-14, Xcode_15.3, --skip-tests)	3m 34s
quickstart (swift, macos-15, Xcode_16.1)	2m 41s
pod-lib-lint (ios, macos-15, Xcode_16.1, --test-specs=unit)	5m 0s
quickstart-ftl-cron-only	0s
pod-lib-lint (tvos, macos-14, Xcode_15.3, --skip-tests)	2m 10s
pod-lib-lint (tvos, macos-15, Xcode_16.1, --test-specs=unit)	3m 7s
spm-package-resolved	1m 10s
storage-integration-tests (Swift)	13m 7s
pod-lib-lint (macos, macos-14, Xcode_15.3, --skip-tests)	2m 3s
storage-integration-tests (ObjC)	5m 51s
pod-lib-lint (macos, macos-15, Xcode_16.1, --test-specs=unit)	2m 50s
pod-lib-lint (watchos, macos-14, Xcode_15.3, --skip-tests)	2m 15s
pod-lib-lint (watchos, macos-15, Xcode_16.1, --test-specs=unit)	1m 44s
spm (macos-13, Xcode_15.2, iOS)	12m 21s
spm (macos-14, Xcode_15.4, iOS)	3m 38s
spm (macos-15, Xcode_16.1, iOS)	2m 35s
spm (macos-15, Xcode_16.1, tvOS)	2m 27s
spm (macos-15, Xcode_16.1, macOS)	1m 47s
spm (macos-15, Xcode_16.1, watchOS)	2m 20s
spm (macos-15, Xcode_16.1, catalyst)	2m 8s
spm (macos-15, Xcode_16.1, visionOS)	2m 29s
storage-cron-only	0s
	1h 15m 17s

Provide feedback