Fix `upload-sarif` Action failing if there are no Code Scanning SARIF files #5702

Job	Run time
Go: tracing with legacy workflow (ubuntu-latest, stable-v2.17.6)	1m 15s
Go: tracing with legacy workflow (macos-latest, stable-v2.18.4)	5m 28s
Go: tracing with legacy workflow (ubuntu-latest, stable-v2.19.4)	1m 35s
Go: tracing with legacy workflow (ubuntu-latest, stable-v2.18.4)	1m 26s
Go: tracing with legacy workflow (macos-latest, stable-v2.19.4)	6m 39s
Go: tracing with legacy workflow (macos-latest, stable-v2.17.6)	6m 35s
Go: tracing with legacy workflow (ubuntu-latest, stable-v2.20.7)	1m 24s
Go: tracing with legacy workflow (macos-latest, stable-v2.22.4)	6m 14s
Go: tracing with legacy workflow (macos-latest, stable-v2.21.4)	6m 3s
Go: tracing with legacy workflow (macos-latest, default)	5m 50s
Go: tracing with legacy workflow (ubuntu-latest, default)	1m 29s
Go: tracing with legacy workflow (ubuntu-latest, stable-v2.21.4)	1m 24s
Go: tracing with legacy workflow (macos-latest, stable-v2.20.7)	5m 49s
Go: tracing with legacy workflow (ubuntu-latest, linked)	1m 23s
Go: tracing with legacy workflow (macos-latest, nightly-latest)	5m 37s
Go: tracing with legacy workflow (ubuntu-latest, nightly-latest)	1m 11s
Go: tracing with legacy workflow (ubuntu-latest, stable-v2.22.4)	1m 22s
Go: tracing with legacy workflow (macos-latest, linked)	4m 35s
	1h 5m 19s

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