Remove support for combining SARIF runs with non-unique categories #9760

Job	Run time
analyze-actions	55s
check-codeql-versions	51s
analyze-javascript (ubuntu-22.04, linked)	5m 22s
analyze-javascript (ubuntu-22.04)	4m 5s
analyze-javascript (macos-14)	6m 16s
analyze-javascript (ubuntu-24.04)	3m 53s
analyze-javascript (ubuntu-24.04, linked)	4m 2s
analyze-javascript (windows-2025, linked)	10m 16s
analyze-javascript (windows-2022, linked)	7m 15s
analyze-javascript (macos-14, linked)	4m 23s
analyze-javascript (windows-2025)	10m 18s
analyze-javascript (windows-2022)	6m 28s
analyze-javascript (macos-13)	7m 52s
analyze-javascript (macos-15, linked)	9m 19s
analyze-javascript (macos-13, linked)	11m 2s
analyze-javascript (macos-15)	3m 53s
	1h 36m 10s

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