token 2022: add metadata pointer extension to js @solana/spl-token client #3948

Job	Run time
cargo-build-test-cli	6h 0m 14s
cargo-test-sbf	22m 40s
cargo-test-sbf-associated-token-account	9m 24s
cargo-test-sbf-transfer-hook	8m 17s
cargo-test-sbf-twoxtx	14m 14s
cargo-test-token-2022-serde	2m 57s
cargo-build-test-transfer-hook-cli	23m 57s
js-test	5m 5s
	7h 26m 48s

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