chore(auth): Revert temporary configurable timeout values #18163

Job	Run time
generate-readme	1m 6s
owlbot-py	1m 14s
gitignore_correctness	1m 4s
gapic-bom	1m 46s
owlbot-yaml	1m 1s
root-pom	1m 40s
group_id_check_for_maps_libraries	7m 58s
package_name_check	1m 1s
	16m 50s

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