chore(bqjdbc): move extended test suite to monorepo #17418

Job	Run time
generate-readme	1m 18s
root-pom	1m 41s
gitignore_correctness	1m 3s
gapic-bom	1m 56s
owlbot-py	1m 8s
owlbot-yaml	1m 11s
group_id_check_for_maps_libraries	8m 10s
package_name_check	1m 9s
	17m 36s

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