Rename BodyWithConfig::into_reader -> reader #2303

Job	Run time
build_versions (stable)	9s
Test	35s
build_versions (beta)	17s
Test	26s
Test (charset)	38s
build_versions (1.67.0)	20s
cargo-deny (aarch64-apple-ios)	18s
Test (charset)	29s
Test (cookies)	48s
cargo-deny (aarch64-linux-android)	21s
Test (cookies)	33s
Test (socks-proxy)	46s
cargo-deny (i686-pc-windows-gnu)	17s
Docs	20s
Test (socks-proxy)	26s
Test (gzip)	36s
cargo-deny (i686-pc-windows-msvc)	18s
Test (gzip)	31s
Test (brotli)	50s
cargo-deny (i686-unknown-linux-gnu)	18s
Test (json)	37s
Test (brotli)	28s
cargo-deny (wasm32-unknown-unknown)	35s
Test (json)	28s
Test (native-tls)	43s
cargo-deny (x86_64-apple-darwin)	19s
Test (native-tls)	36s
cargo-deny (x86_64-apple-ios)	18s
Lint	26s
cargo-deny (x86_64-pc-windows-gnu)	20s
cargo-deny (x86_64-pc-windows-msvc)	18s
cargo-deny (x86_64-unknown-linux-gnu)	20s
cargo-deny (x86_64-unknown-redox)	17s
	15m 1s

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