Fix `upload-sarif` Action failing if there are no Code Scanning SARIF files #5697

Job	Run time
Go: tracing with legacy workflow (macos-latest, stable-v2.17.6)	5m 31s
Go: tracing with legacy workflow (ubuntu-latest, stable-v2.19.4)	1m 46s
Go: tracing with legacy workflow (macos-latest, stable-v2.19.4)	6m 32s
Go: tracing with legacy workflow (macos-latest, stable-v2.18.4)	4m 39s
Go: tracing with legacy workflow (ubuntu-latest, stable-v2.21.4)	1m 30s
Go: tracing with legacy workflow (ubuntu-latest, stable-v2.17.6)	1m 30s
Go: tracing with legacy workflow (ubuntu-latest, stable-v2.20.7)	1m 25s
Go: tracing with legacy workflow (ubuntu-latest, stable-v2.22.4)	1m 27s
Go: tracing with legacy workflow (ubuntu-latest, linked)	1m 10s
Go: tracing with legacy workflow (ubuntu-latest, default)	1m 26s
Go: tracing with legacy workflow (macos-latest, stable-v2.20.7)	6m 56s
Go: tracing with legacy workflow (macos-latest, nightly-latest)	5m 31s
Go: tracing with legacy workflow (macos-latest, stable-v2.21.4)	5m 46s
Go: tracing with legacy workflow (macos-latest, linked)	5m 23s
Go: tracing with legacy workflow (macos-latest, stable-v2.22.4)	6m 45s
Go: tracing with legacy workflow (ubuntu-latest, stable-v2.18.4)	1m 31s
Go: tracing with legacy workflow (macos-latest, default)	5m 24s
Go: tracing with legacy workflow (ubuntu-latest, nightly-latest)	1m 25s
	1h 5m 37s

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