Add debug logging for flaky tests #13202

Job	Run time
lint	1m 35s
addlicense	16s
build	1m 19s
test (macos)	3m 58s
python-format	6s
python-lint	4s
test (windows)	5m 13s
test-default-collection	4m 6s
test-no-xattrs	3m 56s
test (ubuntu)	4m 22s
test-race	5m 40s
test-sgcollect (macos-latest)	51s
test-stats-definition-exporter (macos-latest)	31s
test-sgcollect (windows-latest)	4m 0s
test-stats-definition-exporter (windows-latest)	1m 34s
test-sgcollect (ubuntu-latest)	20s
test-stats-definition-exporter (ubuntu-latest)	1m 22s
	39m 13s

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