Reuse the Client in all cases #605

Job	Run time
Clippy	50s
cargo-build (aarch64-linux-android, ubuntu-22.04)	3m 2s
cargo-test (ubuntu-22.04, default, stable)	2m 52s
cargo-build (armv7-linux-androideabi, ubuntu-22.04)	2m 54s
format	14s
cargo-test (macos-12, default, stable)	4m 3s
cargo-build (i686-linux-android, ubuntu-22.04)	2m 48s
cargo-test (windows-2019, default, stable)	8m 0s
cargo-build (x86_64-linux-android, ubuntu-22.04)	2m 49s
cargo-test (ubuntu-22.04, beta)	4m 19s
cargo-test (ubuntu-22.04, blocking)	4m 22s
cargo-test (ubuntu-22.04, blocking,beta)	4m 37s
cargo-test (ubuntu-22.04, tls-rustls --no-default-features)	4m 12s
cargo-build (x86_64-unknown-linux-musl, ubuntu-22.04)	2m 14s
cargo-test (ubuntu-22.04, tls-vendored-openssl --no-default-features)	4m 55s
cargo-build (aarch64-apple-ios, macos-12)	2m 49s
cargo-test (ubuntu-22.04, beta, default)	2m 51s
cargo-test (ubuntu-22.04, 1.75.0, default)	4m 15s
	1h 2m 6s

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