chore: temporarily disable updating grpc and guava versions until aft… #9814

Job	Run time
build (11)	14m 26s
build (17)	14m 22s
build(21) except self-service clients	13m 21s
build(8) except for gapic-generator-java	4m 10s
build(8) for gapic-generator-java	11m 50s
lint	22s
compatibility	1m 26s
dependency_analyzer_unit_test	13s
gapic-generator-java-bom	1m 39s
showcase (11)	4m 13s
showcase-clirr	0s
showcase-native	8m 29s
showcase (17)	4m 28s
showcase (21)	4m 9s
unmanaged_dependency_check	4m 0s
	1h 27m 8s

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