[POC] add client side logging #9224

Job	Run time
build(21) except self-service clients	2m 36s
build(8) except for gapic-generator-java	2m 48s
build (11)	2m 42s
build (17)	2m 28s
build(8) for gapic-generator-java	55s
compatibility	59s
dependency_analyzer_unit_test	15s
gapic-generator-java-bom	2m 5s
lint	35s
showcase (11)	1m 49s
showcase (17)	2m 3s
showcase-clirr	2m 22s
showcase (21)	1m 44s
showcase-native	3m 47s
unmanaged_dependency_check	9m 17s
	36m 25s

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