Add XCM benchmarks to collectives-westend #9516

Job	Run time
preflight / preflight	43s
preflight / ci-versions	59s
cargo-check-benches (master)	24m 16s
cargo-check-all-crate-macos	12m 55s
test-frame-ui	27m 4s
cargo-check-each-crate (1)	16m 36s
cargo-check-benches (current)	22m 48s
cargo-check-each-crate (2)	17m 18s
test-full-crypto-feature	2m 31s
cargo-check-each-crate (3)	7m 47s
test-node-metrics	8m 9s
cargo-check-each-crate (4)	14m 51s
cargo-check-each-crate (5)	21m 51s
cargo-check-each-crate (6)	13m 14s
cargo-check-each-crate (7)	28m 22s
test-frame-examples-compile-to-wasm	2m 58s
test-deterministic-wasm	6m 9s
check-tracing	2m 15s
check-metadata-hash	5m 51s
node-bench-regression-guard	13s
All test misc tests passed	1s
	3h 56m 51s

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