Aggressively shrink ancient storages when shrink isn't too busy. #10894

Job	Run time
check	3m 43s
cargo-test-sbf (token/program)	9m 11s
test (token/cli, token/program, token/program-2022, associated-token-account/program, instruction...	17m 39s
cargo-test-sbf (instruction-padding/program, token/program-2022, token/program-2022-test)	15m 48s
test (single-pool/cli, single-pool/program)	17m 34s
cargo-test-sbf (associated-token-account/program, associated-token-account/program-test)	8m 22s
test (token-upgrade/cli, token-upgrade/program)	15m 46s
cargo-test-sbf (token-upgrade/program)	7m 20s
cargo-test-sbf (feature-proposal/program)	9m 58s
cargo-test-sbf (governance/addin-mock/program, governance/program)	13m 55s
cargo-test-sbf (memo/program)	7m 38s
cargo-test-sbf (name-service/program)	10m 7s
cargo-test-sbf (stake-pool/program)	11m 51s
cargo-test-sbf (single-pool/program)	9m 17s
	2h 38m 9s

Provide feedback