Revert "Extract client code in send_transaction_service into a new structure" #16003

Job	Run time
cargo-test-sbf (token/program)	7m 16s
check	3m 44s
cargo-test-sbf (instruction-padding/program, token/program-2022, token/program-2022-test)	13m 33s
cargo-test-sbf (associated-token-account/program, associated-token-account/program-test)	8m 23s
test (token/cli, token/program, token/program-2022, associated-token-account/program, instruction...	18m 28s
cargo-test-sbf (token-upgrade/program)	8m 16s
test (single-pool/cli, single-pool/program)	17m 2s
cargo-test-sbf (feature-proposal/program)	7m 31s
test (token-upgrade/cli, token-upgrade/program)	16m 21s
cargo-test-sbf (governance/addin-mock/program, governance/program)	10m 40s
cargo-test-sbf (name-service/program)	7m 3s
cargo-test-sbf (stake-pool/program)	9m 53s
cargo-test-sbf (single-pool/program)	7m 45s
	2h 15m 55s

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