Upgrade fdeflate and remove ZlibStream::in_buffer #387

Job	Run time
powerpc_cross	12s
feature_check	1m 10s
build (1.57.0, ubuntu-latest)	3m 37s
feature_check (benchmarks)	1m 2s
rustfmt	11s
build (1.57.0, windows-latest)	4m 56s
build (1.57.0, macos-latest)	5m 42s
test_all	1m 20s
build (stable, ubuntu-latest)	14s
build (stable, windows-latest)	2m 5s
build (stable, macos-latest)	32s
build (beta, ubuntu-latest)	16s
build (beta, windows-latest)	47s
build (beta, macos-latest)	25s
build (nightly, ubuntu-latest)	17s
build (nightly, windows-latest)	31s
build (nightly, macos-latest)	46s
	24m 3s

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