Fix `upload-sarif` Action failing if there are no Code Scanning SARIF files #7775

Job	Run time
Packaging: Config file (ubuntu-latest, linked)	1m 51s
Packaging: Config file (windows-latest, default)	3m 20s
Packaging: Config file (windows-latest, linked)	4m 23s
Packaging: Config file (macos-latest, linked)	1m 31s
Packaging: Config file (ubuntu-latest, nightly-latest)	1m 53s
Packaging: Config file (ubuntu-latest, default)	1m 33s
Packaging: Config file (macos-latest, nightly-latest)	1m 24s
Packaging: Config file (windows-latest, nightly-latest)	3m 50s
Packaging: Config file (macos-latest, default)	1m 45s
	21m 30s

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