Update merkleized-metadata to 0.2.0 #8240

Job	Run time
preflight / preflight	40s
preflight / ci-versions	1m 0s
cargo-check-benches (master)	20m 48s
test-frame-ui	27m 34s
cargo-check-benches (current)	22m 13s
test-node-metrics	8m 11s
test-full-crypto-feature	2m 32s
cargo-check-all-crate-macos	12m 2s
cargo-check-each-crate (1)	15m 48s
cargo-check-each-crate (2)	16m 34s
cargo-check-each-crate (3)	7m 27s
cargo-check-each-crate (4)	14m 36s
cargo-check-each-crate (5)	21m 23s
cargo-check-each-crate (6)	13m 39s
cargo-check-each-crate (7)	27m 44s
test-frame-examples-compile-to-wasm	2m 56s
test-deterministic-wasm	6m 11s
check-tracing	2m 10s
check-metadata-hash	6m 7s
node-bench-regression-guard	15s
All test misc tests passed	1s
	3h 49m 51s

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