Simplify broadcast extension setup with standard format for identifiers #797

Job	Run time
test (macos-13, 14.2, iOS Simulator,OS=17.2,name=iPhone 14 Pro)	18m 30s
test (macos-13, 14.2, macOS)	5m 23s
test (macos-13, 14.2, macOS,variant=Mac Catalyst)	8m 54s
test (macos-14, 15.4, iOS Simulator,OS=17.5,name=iPhone 15 Pro)	6m 21s
test (macos-14, 15.4, macOS)	4m 11s
test (macos-14, 15.4, macOS,variant=Mac Catalyst)	4m 28s
test (macos-14, 15.4, visionOS Simulator,name=Apple Vision Pro)	4m 44s
test (macos-14, 15.4, tvOS Simulator,name=Apple TV)	6m 12s
test (macos-15, 16.2, iOS Simulator,OS=18.1,name=iPhone 16 Pro)	6m 43s
test (macos-15, 16.2, macOS)	3m 55s
test (macos-15, 16.2, macOS,variant=Mac Catalyst)	4m 5s
	1h 13m 26s

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