token 2022: add metadata pointer extension to js @solana/spl-token client #3950

Job	Run time
cargo-build-test-cli	39m 19s
cargo-test-sbf	21m 46s
cargo-test-sbf-associated-token-account	14m 8s
cargo-test-sbf-transfer-hook	8m 34s
cargo-test-sbf-twoxtx	14m 38s
cargo-test-token-2022-serde	4m 52s
cargo-build-test-transfer-hook-cli	12m 17s
js-test	5m 12s
	2h 0m 46s

Provide feedback