Fix `upload-sarif` Action failing if there are no Code Scanning SARIF files #7768

Job	Run time
Packaging: Config and input (ubuntu-latest, linked)	1m 29s
Packaging: Config and input (macos-latest, linked)	2m 30s
Packaging: Config and input (ubuntu-latest, default)	1m 27s
Packaging: Config and input (windows-latest, linked)	3m 24s
Packaging: Config and input (windows-latest, nightly-latest)	7m 13s
Packaging: Config and input (macos-latest, nightly-latest)	1m 48s
Packaging: Config and input (windows-latest, default)	4m 39s
Packaging: Config and input (macos-latest, default)	2m 8s
Packaging: Config and input (ubuntu-latest, nightly-latest)	1m 52s
	26m 30s

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