Reuse the Client in all cases #609

Job	Run time
Clippy	49s
format	31s
cargo-test (ubuntu-22.04, default, stable)	3m 0s
cargo-build (aarch64-linux-android, ubuntu-22.04)	2m 54s
cargo-test (macos-13, default, stable)	9m 9s
cargo-build (armv7-linux-androideabi, ubuntu-22.04)	2m 49s
cargo-test (windows-2019, default, stable)	7m 14s
cargo-test (ubuntu-22.04, beta)	4m 30s
cargo-build (i686-linux-android, ubuntu-22.04)	2m 55s
cargo-test (ubuntu-22.04, blocking)	5m 51s
cargo-build (x86_64-linux-android, ubuntu-22.04)	2m 46s
cargo-test (ubuntu-22.04, blocking,beta)	4m 38s
cargo-build (x86_64-unknown-linux-musl, ubuntu-22.04)	2m 20s
cargo-test (ubuntu-22.04, tls-rustls --no-default-features)	4m 7s
cargo-build (aarch64-apple-ios, macos-13)	4m 35s
cargo-test (ubuntu-22.04, tls-vendored-openssl --no-default-features)	5m 3s
cargo-test (ubuntu-22.04, beta, default)	3m 5s
cargo-test (ubuntu-22.04, 1.75.0, default)	4m 2s
	1h 10m 18s

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