Use Hikari Connection Pool for handling Clickhouse connections #1039

Job	Run time
build-kafka-lightweight / build	2m 47s
java-tests-kafka / java-kafka	1h 9m 1s
testflows-lightweight / testflows-lightweight	4h 50m 4s
testflows-kafka / testflows-kafka	3h 10m 32s
java-tests-lightweight / java-lightweight	1h 18m 38s
testflows-lightweight / testflows-lightweight-replicated	4h 50m 0s
	15h 21m 2s

Provide feedback