chore: migrate java-bigquerystorage to monorepo #16202

Job	Run time
owlbot-yaml	52s
gapic-bom	1m 18s
package_name_check	51s
gitignore_correctness	51s
owlbot-py	56s
root-pom	1m 21s
generate-readme	54s
group_id_check_for_maps_libraries	6m 55s
	13m 58s

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