Fix migrations for pallet-xcm #4158

Job	Run time
preflight / preflight	44s
preflight / preflight	44s
preflight / ci-versions	1m 3s
preflight / ci-versions	1m 3s
test-full-crypto-feature	2m 37s
test-full-crypto-feature	2m 37s
cargo-check-benches (master)	20m 10s
cargo-check-benches (master)	20m 10s
cargo-check-benches (current)	22m 30s
cargo-check-benches (current)	22m 30s
cargo-check-each-crate (1)	14m 24s
cargo-check-each-crate (1)	21m 25s
test-frame-ui	45m 55s
test-frame-ui	45m 55s
cargo-check-each-crate (2)	14m 14s
cargo-check-each-crate (2)	19m 43s
cargo-check-each-crate (3)	7m 50s
cargo-check-each-crate (3)	7m 50s
test-node-metrics	11m 44s
test-node-metrics	11m 44s
cargo-check-each-crate (4)	14m 24s
cargo-check-each-crate (4)	20m 21s
cargo-check-each-crate (5)	14m 24s
cargo-check-each-crate (5)	27m 53s
cargo-check-each-crate (6)	14m 21s
cargo-check-each-crate (6)	14m 46s
cargo-check-each-crate (7)	14m 22s
cargo-check-each-crate (7)	32m 47s
cargo-check-all-crate-macos	12m 20s
cargo-check-all-crate-macos	12m 20s
test-frame-examples-compile-to-wasm	2m 59s
test-frame-examples-compile-to-wasm	2m 59s
check-tracing	2m 24s
check-tracing	2m 24s
test-deterministic-wasm	7m 35s
test-deterministic-wasm	7m 35s
check-metadata-hash	6m 49s
check-metadata-hash	6m 49s
node-bench-regression-guard	17s
node-bench-regression-guard	17s
All test misc tests passed	1s
All test misc tests passed	1s
	8h 33m 0s

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