Fix setting an account override for fee payer #8529

Job	Run time
cargo-test-sbf (token/program)	9m 11s
cargo-test-sbf (instruction-padding/program, token/program-2022, token/program-2022-test)	17m 32s
cargo-test-sbf (associated-token-account/program, associated-token-account/program-test)	8m 33s
cargo-test-sbf (token-upgrade/program)	10m 25s
cargo-test-sbf (feature-proposal/program)	8m 32s
cargo-test-sbf (governance/addin-mock/program, governance/program)	13m 46s
cargo-test-sbf (memo/program)	7m 19s
check	4m 51s
cargo-test-sbf (name-service/program)	9m 5s
test (token/cli, token/program, token/program-2022, associated-token-account/program, instruction...	20m 17s
cargo-test-sbf (stake-pool/program)	10m 23s
test (single-pool/cli, single-pool/program)	20m 7s
cargo-test-sbf (single-pool/program)	9m 32s
test (token-upgrade/cli, token-upgrade/program)	16m 20s
	2h 45m 53s

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