refactor: use Clock protocol when available (#633) #781

Job	Run time
Examples	5m 45s
xcodebuild (test, IOS)	5m 21s
xcodebuild (test, MAC_CATALYST)	4m 28s
xcodebuild-macOS-14 (test, IOS)	11m 18s
xcodebuild (test, MACOS)	4m 39s
xcodebuild-macOS-14 (test, MAC_CATALYST)	2m 29s
xcodebuild (test, TVOS)	4m 33s
xcodebuild-macOS-14 (test, MACOS)	3m 18s
xcodebuild (test, WATCHOS)	4m 50s
xcodebuild-macOS-14 (test, TVOS)	2m 42s
xcodebuild (IOS)	5m 4s
xcodebuild-macOS-14 (test, WATCHOS)	3m 35s
xcodebuild (MAC_CATALYST)	4m 47s
xcodebuild-macOS-14 (IOS)	2m 29s
xcodebuild (MACOS)	4m 35s
xcodebuild-macOS-14 (MAC_CATALYST)	3m 1s
xcodebuild (TVOS)	4m 27s
xcodebuild-macOS-14 (MACOS)	3m 23s
xcodebuild (WATCHOS)	4m 45s
xcodebuild-macOS-14 (TVOS)	2m 7s
xcodebuild-macOS-14 (WATCHOS)	4m 2s
	1h 31m 38s

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