Fix excessive stack sizes #2720

Job	Run time
build_versions (stable)	2m 41s
Test	1m 2s
build_versions (beta)	2m 48s
Test	41s
Test (charset)	53s
Docs	1m 43s
build_versions (1.71.1)	2m 43s
Test (charset)	45s
Test (cookies)	1m 21s
Test (cookies)	1m 1s
Test (socks-proxy)	1m 5s
Lint	29s
Test (socks-proxy)	44s
Test (gzip)	53s
Test (gzip)	44s
Test (brotli)	53s
Test (brotli)	53s
Test (json)	58s
cargo-deny (aarch64-apple-ios)	21s
Test (json)	1m 17s
Test (native-tls)	1m 13s
cargo-deny (aarch64-linux-android)	21s
Test (native-tls)	1m 14s
cargo-deny (i686-pc-windows-gnu)	18s
Test (rustls-no-provider)	49s
cargo-deny (i686-pc-windows-msvc)	18s
cargo-deny (i686-unknown-linux-gnu)	24s
cargo-deny (wasm32-unknown-unknown)	20s
cargo-deny (x86_64-apple-darwin)	22s
cargo-deny (x86_64-apple-ios)	18s
cargo-deny (x86_64-pc-windows-gnu)	21s
cargo-deny (x86_64-pc-windows-msvc)	18s
cargo-deny (x86_64-unknown-linux-gnu)	18s
cargo-deny (x86_64-unknown-redox)	18s
	30m 47s

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