chore: migrate java-bigquery to monorepo #16500

Job	Run time
owlbot-py	1m 15s
gapic-bom	1m 40s
group_id_check_for_maps_libraries	7m 3s
gitignore_correctness	1m 4s
package_name_check	56s
owlbot-yaml	1m 6s
generate-readme	1m 0s
root-pom	1m 48s
generate-readme	1m 7s
owlbot-py	1m 15s
gitignore_correctness	1m 4s
root-pom	1m 48s
package_name_check	56s
group_id_check_for_maps_libraries	7m 3s
gapic-bom	1m 40s
owlbot-yaml	1m 6s
	31m 51s

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