Introduce hyper::ext::Http1RawMessage #2359

Job	Run time
Check Style	4s
Verify hyper.h is up to date	12s
Test with Miri	1m 18s
Test C API (FFI)	23s
Check deprecated on stable	24s
features	52s
Check deprecated on beta	18s
Check MSRV (1.63)	19s
Test stable on ubuntu-latest	1m 51s
Test stable on windows-latest	3m 17s
Test stable on macOS-latest	3m 8s
Test beta on ubuntu-latest	1m 32s
Test beta on windows-latest	2m 36s
Test beta on macOS-latest	3m 11s
Test nightly on ubuntu-latest	1m 33s
Test nightly on windows-latest	2m 45s
Test nightly on macOS-latest	3m 24s
Build docs	21s
CI is green	1s
	27m 29s

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