v1.16: Add warning about deprecated snapshot archive formats #2446

Job	Run time
check	8m 28s
cargo-test-sbf (token/program)	13m 3s
test (token/cli, token/program, token/program-2022, associated-token-account/program)	34m 18s
test (single-pool/cli, single-pool/program)	25m 55s
test (token-upgrade/cli, token-upgrade/program)	24m 20s
cargo-test-sbf (instruction-padding/program, token/program-2022, token/program-2022-test)	28m 22s
cargo-test-sbf (associated-token-account/program, associated-token-account/program-test)	20m 27s
cargo-test-sbf (token-upgrade/program)	19m 48s
cargo-test-sbf (feature-proposal/program)	14m 44s
cargo-test-sbf (governance/addin-mock/program, governance/program)	20m 7s
cargo-test-sbf (memo/program)	16m 22s
cargo-test-sbf (name-service/program)	15m 0s
cargo-test-sbf (stake-pool/program)	25m 11s
cargo-test-sbf (single-pool/program)	20m 55s
	4h 47m 0s

Provide feedback