chore(hermetic-build): include .github template updates as part of generation #10618

Job	Run time
build (11)	15m 9s
build(21) except self-service clients	13m 20s
build (17)	14m 3s
build(8) except for gapic-generator-java	4m 25s
build(8) for gapic-generator-java	10m 58s
compatibility	1m 24s
dependency_analyzer_unit_test	16s
gapic-generator-java-bom	1m 49s
lint	34s
showcase (11)	8m 52s
showcase-clirr	2m 55s
showcase (17)	8m 43s
showcase (21)	9m 2s
showcase (23)	9m 9s
unmanaged_dependency_check	4m 17s
	1h 44m 56s

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