Make various fields in the State structure smaller #1173

Job	Run time
QEMU build & test (stable, ubuntu-latest, s390x-unknown-linux-gnu, s390x-linux-gnu-gcc)	1m 16s
Clippy	2m 30s
QEMU build & test (stable, ubuntu-latest, i686-unknown-linux-gnu, i686-linux-gnu-gcc)	1m 19s
Build and test (stable, ubuntu-latest, x86_64-unknown-linux-gnu)	34s
cargo-c dynamic library	16s
Build and test (msrv, ubuntu-latest, x86_64-unknown-linux-gnu)	36s
Build and test (beta, ubuntu-latest, x86_64-unknown-linux-gnu)	39s
Clippy (--no-default-features --features="c-allocator")	19s
Smoke-test fuzzing targets (default)	2m 30s
Build and test (stable, macos-latest, x86_64-apple-darwin)	44s
Clippy (--no-default-features --features="rust-allocator")	20s
Smoke-test fuzzing targets (stable, macos-14, aarch64-apple-darwin)	2m 26s
Smoke-test fuzzing targets (c-allocator)	2m 34s
Build and test (stable, macos-14, aarch64-apple-darwin)	41s
Smoke-test fuzzing targets (rust-allocator)	2m 34s
vanilla dynamic library	30s
Build and test (stable-x86_64-gnu, windows-2022, x86_64-pc-windows-gnu)	35s
Miri	1m 44s
run flate2 test suite	21s
wasm32	37s
	23m 5s

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