token-client: Make confirmation of `ProgramRpcClientSendTransaction` optional #5307

Job	Run time
cargo-test-sbf	12m 32s
cargo-test-sbf-associated-token-account	5m 18s
cargo-test-sbf-token-2022	11m 3s
cargo-test-sbf-transfer-hook	4m 35s
cargo-test-token-2022-serde	3m 13s
js-test	8m 17s
cargo-build-test-cli	17m 52s
cargo-build-test-transfer-hook-cli	13m 25s
	1h 16m 15s

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