Simplify unit test based on PR suggestions #11970

Job	Run time
addlicense	16s
build	1m 17s
lint	47s
python-format	5s
python-lint	8s
test (macos)	3m 37s
test-default-collection	4m 3s
test-race	5m 37s
test (windows)	5m 27s
test-no-xattrs	4m 12s
test-sgcollect (macos-latest)	26s
test (ubuntu)	4m 29s
test-stats-definition-exporter (macos-latest)	32s
test-sgcollect (windows-latest)	3m 43s
test-stats-definition-exporter (windows-latest)	2m 25s
test-sgcollect (ubuntu-latest)	27s
test-stats-definition-exporter (ubuntu-latest)	1m 13s
	38m 44s

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