make new_from_bank to be only for tests (#3455) #12727

Job	Run time
cargo-test-sbf (token/program)	7m 57s
check	2m 30s
cargo-test-sbf (instruction-padding/program, token/program-2022, token/program-2022-test)	17m 13s
test (token/cli, token/program, token/program-2022, associated-token-account/program, instruction...	19m 25s
cargo-test-sbf (associated-token-account/program, associated-token-account/program-test)	9m 48s
test (single-pool/cli, single-pool/program)	17m 34s
cargo-test-sbf (token-upgrade/program)	8m 2s
test (token-upgrade/cli, token-upgrade/program)	17m 18s
cargo-test-sbf (feature-proposal/program)	9m 35s
cargo-test-sbf (governance/addin-mock/program, governance/program)	11m 39s
cargo-test-sbf (memo/program)	10m 27s
cargo-test-sbf (name-service/program)	7m 55s
cargo-test-sbf (stake-pool/program)	10m 55s
cargo-test-sbf (single-pool/program)	8m 10s
	2h 38m 28s

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