fix: normalize indentation in owlbot yamls for new libraries #17610

Job	Run time
owlbot-py	1m 18s
generate-readme	1m 11s
gapic-bom	1m 42s
owlbot-yaml	1m 3s
gitignore_correctness	1m 2s
root-pom	1m 47s
package_name_check	1m 4s
group_id_check_for_maps_libraries	2m 18s
	11m 25s

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