feat(bigquery): add url.template to span tracing #16847

Job	Run time
root-pom	1m 47s
owlbot-py	1m 12s
owlbot-yaml	1m 3s
gapic-bom	1m 34s
group_id_check_for_maps_libraries	7m 30s
package_name_check	1m 1s
generate-readme	1m 4s
gitignore_correctness	1m 3s
	16m 14s

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