feat: overhaul protocol test generation to use actual client #3645

Job	Run time
apple-ci (macos-13, Xcode_15.2, platform=iOS Simulator,OS=17.2,name=iPhone 15)	9m 0s
apple-ci (macos-13, Xcode_15.2, platform=tvOS Simulator,OS=17.2,name=Apple TV 4K (3rd generation)...	7m 6s
apple-downstream (macos-13, Xcode_15.2, platform=iOS Simulator,OS=17.2,name=iPhone 15)	10m 57s
apple-ci (macos-13, Xcode_15.2, platform=OS X)	5m 41s
linux-ci (5.9-amazonlinux2)	3m 39s
apple-downstream (macos-13, Xcode_15.2, platform=tvOS Simulator,OS=17.2,name=Apple TV 4K (3rd gen...	8m 7s
apple-ci (macos-14, Xcode_15.4, platform=iOS Simulator,OS=17.5,name=iPhone 15)	4m 17s
linux-ci (5.9-focal)	3m 42s
apple-downstream (macos-13, Xcode_15.2, platform=OS X)	1h 37m 36s
linux-downstream (5.9-amazonlinux2)	5m 2s
apple-ci (macos-14, Xcode_15.4, platform=tvOS Simulator,OS=17.5,name=Apple TV 4K (3rd generation)...	5m 30s
linux-ci (5.10-amazonlinux2)	3m 45s
apple-downstream (macos-14, Xcode_15.4, platform=iOS Simulator,OS=17.5,name=iPhone 15)	6m 9s
linux-downstream (5.9-focal)	4m 56s
apple-ci (macos-14, Xcode_15.4, platform=OS X)	3m 18s
linux-ci (5.10-jammy)	3m 55s
apple-downstream (macos-14, Xcode_15.4, platform=tvOS Simulator,OS=17.5,name=Apple TV 4K (3rd gen...	5m 11s
linux-downstream (5.10-amazonlinux2)	4m 50s
apple-downstream (macos-14, Xcode_15.4, platform=OS X)	4m 55s
linux-downstream (5.10-jammy)	4m 55s
	3h 22m 31s

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