chore: setup release-please to update generator version in generation… #6911

Job	Run time
build (11)	12m 57s
build (17)	12m 38s
build(21) except self-service clients	11m 18s
build(8) except for gapic-generator-java	4m 0s
build(8) for gapic-generator-java	9m 20s
lint	21s
compatibility	1m 31s
gapic-generator-java-bom	1m 50s
showcase (11)	4m 9s
showcase (17)	4m 2s
showcase-clirr	0s
showcase-native	8m 20s
unmanaged_dependency_check	4m 50s
dependency_analyzer_unit_test	14s
	1h 15m 30s

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