chore(hermetic-build): use secure base image hosted in docker.com #8820

Job	Run time
build(21) except self-service clients	13m 57s
build(8) except for gapic-generator-java	4m 19s
build(8) for gapic-generator-java	11m 57s
build (11)	15m 25s
lint	22s
build (17)	14m 53s
compatibility	1m 36s
dependency_analyzer_unit_test	12s
gapic-generator-java-bom	1m 42s
showcase (11)	4m 13s
showcase (17)	4m 0s
showcase (21)	4m 12s
showcase-clirr	3m 8s
showcase-native	8m 8s
unmanaged_dependency_check	3m 52s
	1h 31m 56s

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