Implement Clone for ChainedConnector #2792

Job	Run time
build_versions (stable)	16s
cargo-deny (aarch64-apple-ios)	19s
build_versions (beta)	21s
Test	1m 0s
cargo-deny (aarch64-linux-android)	18s
build_versions (1.71.1)	21s
Test	51s
Test (charset)	1m 1s
cargo-deny (i686-pc-windows-gnu)	26s
Test (charset)	51s
Test (cookies)	1m 12s
cargo-deny (i686-pc-windows-msvc)	21s
Test (cookies)	1m 2s
Docs	1m 49s
Test (socks-proxy)	1m 0s
Test (socks-proxy)	50s
Test (gzip)	1m 2s
cargo-deny (i686-unknown-linux-gnu)	20s
Lint	35s
Test (gzip)	52s
Test (brotli)	1m 10s
cargo-deny (wasm32-unknown-unknown)	32s
Test (brotli)	51s
Test (json)	1m 1s
cargo-deny (x86_64-apple-darwin)	21s
Test (json)	53s
Test (native-tls)	1m 8s
cargo-deny (x86_64-apple-ios)	19s
Test (native-tls)	58s
cargo-deny (x86_64-pc-windows-gnu)	24s
Test (rustls-no-provider)	56s
cargo-deny (x86_64-pc-windows-msvc)	22s
cargo-deny (x86_64-unknown-linux-gnu)	20s
cargo-deny (x86_64-unknown-redox)	18s
	24m 20s

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