Revamp broadcast IPC #787

Job	Run time
test (macos-13, 14.2, iOS Simulator,OS=17.2,name=iPhone 14 Pro)	12m 19s
test (macos-13, 14.2, macOS)	5m 59s
test (macos-13, 14.2, macOS,variant=Mac Catalyst)	4m 40s
test (macos-14, 15.4, iOS Simulator,OS=17.5,name=iPhone 15 Pro)	19m 4s
test (macos-14, 15.4, macOS)	5m 4s
test (macos-14, 15.4, macOS,variant=Mac Catalyst)	3m 38s
test (macos-14, 15.4, visionOS Simulator,name=Apple Vision Pro)	5m 48s
test (macos-14, 15.4, tvOS Simulator,name=Apple TV)	4m 53s
test (macos-15, 16.2, iOS Simulator,OS=18.1,name=iPhone 16 Pro)	6m 7s
test (macos-15, 16.2, macOS)	3m 56s
test (macos-15, 16.2, macOS,variant=Mac Catalyst)	4m 5s
	1h 15m 33s

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