XCM executor: refund unused swapped fees #23635

Job	Run time
isdraft / isdraft	2s
check-dependency-rules	11s
check-fail-ci	12s
check-markdown	16s
check-workspace	21s
check-readme	3m 16s
preflight / preflight	9s
preflight / ci-versions	1m 12s
fmt	1m 16s
check-rust-feature-propagation	2m 12s
check-toml-format	1m 10s
check-umbrella	2m 14s
test-rust-features	2m 18s
All quick checks passed	1s
	14m 50s

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