refactor(http1): replace many args of Chunked::step with struct (#3982) #3115

Job	Run time
Check Style	9s
Verify hyper.h is up to date	22s
semver	18s
Test with Miri	2m 12s
Check MSRV	21s
features	41s
Test stable on windows-latest	2m 4s
Test beta on ubuntu-latest	51s
Test stable on ubuntu-latest	47s
Test beta on macOS-latest	1m 41s
Test nightly on macOS-latest	2m 0s
minimal-versions	35s
Test beta on windows-latest	2m 4s
Test nightly on windows-latest	2m 24s
Test stable on macOS-latest	1m 16s
Test cargo-c support (FFI)	23s
Test nightly on ubuntu-latest	1m 10s
Test C API (FFI)	41s
udeps	27s
Check exposed types	18s
Build docs	24s
CI is green	4s
	21m 12s

Provide feedback