chore: add JDK 25 to the CI build #15228

Job	Run time
gapic-bom	1m 23s
root-pom	1m 25s
owlbot-py	51s
gitignore_correctness	45s
owlbot-yaml	46s
package_name_check	42s
generate-readme	57s
group_id_check_for_maps_libraries	6m 19s
	13m 8s

Provide feedback