`x/community` and e2e test improvements #726

Job	Run time
default / build	2m 30s
default / test	13m 28s
default / validate-internal-testnet-genesis	3m 15s
default / validate-protonet-genesis	3m 3s
rocksdb / build	15m 53s
rocksdb / test	15m 58s
post-pipeline-metrics / metric-pipeline-result	7s
	54m 14s

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