chore: [wip] PQC POC 2 #19179

Job	Run time
generate-readme	1m 12s
owlbot-py	1m 38s
root-pom	1m 48s
group_id_check_for_maps_libraries	1m 46s
package_name_check	1m 26s
owlbot-yaml	1m 8s
gitignore_correctness	1m 28s
gapic-bom	1m 48s
	12m 14s

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