malus-collator: implement malicious collator submitting same collation to all backing groups #17674

Job	Run time
preflight / preflight	44s
preflight / ci-versions	1m 3s
check-runtime-migration (westend)	9m 27s
check-runtime-migration (asset-hub-westend)	7m 43s
check-runtime-migration (bridge-hub-westend)	4m 51s
check-runtime-migration (collectives-westend)	4m 53s
check-runtime-migration (coretime-westend)	5m 3s
All runtime migrations passed	1s
	33m 45s

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