feat: Add support for eventstream input & initial request to RPC-based protocols #2955

Job	Run time
linux (focal, 5.7)	4m 9s
apple (macos-13-xlarge, Xcode_14.1, platform=iOS Simulator,OS=16.1,name=iPhone 14)	2m 26s
linux (focal, 5.9)	4m 8s
apple (macos-13-xlarge, Xcode_14.1, platform=tvOS Simulator,OS=16.1,name=Apple TV 4K (3rd generat...	2m 23s
linux (amazonlinux2, 5.7)	4m 6s
linux (amazonlinux2, 5.9)	4m 29s
apple (macos-13-xlarge, Xcode_14.1, platform=OS X)	2m 27s
apple (macos-14-xlarge, Xcode_15.2, platform=iOS Simulator,OS=17.2,name=iPhone 15)	2m 18s
apple (macos-14-xlarge, Xcode_15.2, platform=tvOS Simulator,OS=17.2,name=Apple TV 4K (3rd generat...	2m 20s
apple (macos-14-xlarge, Xcode_15.2, platform=OS X)	2m 22s
	31m 8s

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