chore(bqjdbc): refactor log levels #20695

Job	Run time
bulk-filter	1m 7s
windows	3m 0s
generation-config-check	1m 39s
changes	1m 24s
enforcer	19m 32s
lint	3m 34s
gapic-libraries-bom	15m 17s
units (8)	46s
units (17)	32s
units (25)	48s
units (21)	30s
units (11)	30s
split-dependencies (java-bigquery)	4m 25s
split-clirr (java-bigquery)	3m 33s
split-units (java-bigquery, 17)	5m 32s
split-units (java-bigquery, 11)	5m 20s
split-units (java-bigquery, 25)	5m 9s
split-units (java-bigquery, 8)	4m 45s
split-units (java-bigquery, 21)	5m 9s
conditional-required-check	2s
	1h 22m 34s

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