Add `pub` to xcm::v4::PalletInfo #3944

Job	Run time
set-image	5s
check-runtime-migration (asset-hub-westend)	9m 37s
check-runtime-migration (asset-hub-rococo)	19m 52s
check-runtime-migration (bridge-hub-westend)	5m 8s
check-runtime-migration (bridge-hub-rococo)	5m 21s
check-runtime-migration (contracts-rococo)	9m 34s
check-runtime-migration (collectives-westend)	5m 26s
check-runtime-migration (coretime-rococo)	5m 33s
	1h 0m 36s

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