impl(o11y): introduce `url.full` #16938

Job	Run time
generate-readme	1m 9s
root-pom	1m 50s
package_name_check	1m 5s
owlbot-py	1m 15s
gitignore_correctness	1m 6s
gapic-bom	1m 40s
owlbot-yaml	1m 7s
group_id_check_for_maps_libraries	7m 36s
	16m 48s

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