Remove support for combining SARIF runs with non-unique categories #731

Job	Run time
Upload debug artifacts after failure in analyze (default)	3m 2s
Upload debug artifacts after failure in analyze (linked)	3m 2s
Upload debug artifacts after failure in analyze (stable-v2.20.3)	1m 43s
Upload debug artifacts after failure in analyze (nightly-latest)	3m 8s
Download and check debug artifacts after failure in analyze	33s
	11m 28s

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