refactor(common): move compat constructor to method #2235

Job	Run time
Verify hyper.h is up to date	25s
Check Style	5s
features	18s
Test with Miri	1m 0s
Check MSRV	52s
Test C API (FFI)	28s
Test stable on ubuntu-latest	1m 48s
udeps	33s
Test stable on windows-latest	4m 33s
Test stable on macOS-latest	2m 21s
Test beta on ubuntu-latest	1m 30s
Test beta on windows-latest	2m 34s
Test beta on macOS-latest	1m 21s
Test nightly on ubuntu-latest	2m 15s
Test nightly on windows-latest	2m 43s
Test nightly on macOS-latest	2m 23s
Check exposed types	25s
Build docs	25s
CI is green	3s
	26m 2s

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