chore(bigquery-jdbc): dockerized proxy environment to run integration… #4094

Job	Run time
filter	1m 8s
sdk-platform-java self-service clients	0s
sdk-platform-java units	0s
sdk-platform-java integration (JDK 24+)	0s
java8-compatibility	0s
gapic-generator-java (8)	0s
dependencies	0s
sdk-platform-java units (8)	0s
sdk-platform-java integration	0s
unmanaged_dependency_check	0s
clirr	0s
dependency_analyzer_unit_test	0s
gapic-generator-java-bom	0s
	1m 8s

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