deps: Update maven-shared-utils to v3.2.1 (#3768) #4984

Job	Run time
build(21) except self-service clients	13m 42s
build (11)	14m 30s
build (17)	15m 2s
build(8) except for gapic-generator-java	4m 41s
gapic-generator-java-bom	1m 49s
compatibility	1m 31s
unmanaged_dependency_check	3m 54s
build(8) for gapic-generator-java	11m 18s
showcase-clirr	0s
showcase (11)	8m 51s
lint	49s
showcase (17)	9m 28s
showcase (21)	8m 44s
dependency_analyzer_unit_test	19s
showcase (23)	9m 50s
	1h 44m 28s

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