Add ability to set `stopFetchingTriggersCompletionHandler` on all fet… #270

Job	Run time
swift (debug)	2m 34s
xcodebuild (ios, Debug)	8m 25s
swift (release)	2m 21s
xcodebuild (ios, Release)	8m 5s
xcodebuild (macos, Debug)	2m 54s
xcodebuild (macos, Release)	2m 58s
xcodebuild (tvos, Debug)	2m 54s
xcodebuild (tvos, Release)	2m 59s
xcodebuild (visionos, Debug)	4m 33s
xcodebuild (visionos, Release)	5m 7s
xcodebuild (watchos, Debug)	1m 39s
xcodebuild (watchos, Release)	1m 17s
	45m 46s

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