Use Hikari Connection Pool for handling Clickhouse connections #1064

Job	Run time
build-kafka-lightweight / build	2m 55s
java-tests-lightweight / java-lightweight	25m 15s
testflows-lightweight / testflows-lightweight	25m 16s
java-tests-kafka / java-kafka	27m 39s
testflows-kafka / testflows-kafka	25m 27s
testflows-lightweight / testflows-lightweight-replicated	25m 15s
	2h 11m 47s

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