chore: remove java-vertexai from releasing #17412

Job	Run time
root-pom	1m 45s
generate-readme	1m 8s
gitignore_correctness	1m 1s
owlbot-yaml	1m 1s
owlbot-py	1m 10s
gapic-bom	1m 41s
group_id_check_for_maps_libraries	7m 54s
package_name_check	1m 4s
	16m 44s

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