Revamp broadcast IPC #780

Job	Run time
test (macos-13, 14.2, iOS Simulator,OS=17.2,name=iPhone 14 Pro)	26m 30s
test (macos-13, 14.2, macOS)	6m 29s
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)	2m 27s
test (macos-14, 15.4, macOS)	3m 36s
test (macos-14, 15.4, macOS,variant=Mac Catalyst)	1m 38s
test (macos-14, 15.4, visionOS Simulator,name=Apple Vision Pro)	6m 5s
test (macos-14, 15.4, tvOS Simulator,name=Apple TV)	4m 16s
test (macos-15, 16.2, iOS Simulator,OS=18.1,name=iPhone 16 Pro)	7m 1s
test (macos-15, 16.2, macOS)	3m 53s
test (macos-15, 16.2, macOS,variant=Mac Catalyst)	4m 46s
	1h 11m 21s

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