chore(bqjdbc): refactor log levels #20568

Job	Run time
generation-config-check	1m 38s
bulk-filter	1m 5s
gapic-libraries-bom	20m 6s
enforcer	19m 34s
lint	3m 11s
changes	1m 5s
windows	2m 37s
units (8)	53s
units (25)	36s
units (17)	31s
units (11)	30s
units (21)	35s
split-dependencies (java-bigquery)	4m 22s
split-units (java-bigquery, 25)	5m 22s
split-units (java-bigquery, 11)	5m 3s
split-units (java-bigquery, 8)	4m 47s
split-units (java-bigquery, 17)	5m 6s
split-clirr (java-bigquery)	3m 58s
split-units (java-bigquery, 21)	4m 47s
conditional-required-check	3s
	1h 25m 49s

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