Do not enforce network key presence for collators #3147

Job	Run time
set-image	9s
set-image	9s
check-runtime-migration (asset-hub-westend)	4m 6s
check-runtime-migration (asset-hub-westend)	4m 6s
check-runtime-migration (asset-hub-rococo)	14m 39s
check-runtime-migration (asset-hub-rococo)	21m 49s
check-runtime-migration (bridge-hub-westend)	4m 24s
check-runtime-migration (bridge-hub-westend)	4m 24s
check-runtime-migration (bridge-hub-rococo)	4m 8s
check-runtime-migration (bridge-hub-rococo)	4m 8s
check-runtime-migration (contracts-rococo)	8m 28s
check-runtime-migration (contracts-rococo)	8m 28s
check-runtime-migration (collectives-westend)	4m 26s
check-runtime-migration (collectives-westend)	4m 26s
check-runtime-migration (coretime-rococo)	4m 22s
check-runtime-migration (coretime-rococo)	4m 22s
	1h 36m 34s

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