Fix `upload-sarif` Action failing if there are no Code Scanning SARIF files #5701

Job	Run time
Go: tracing with custom build steps (macos-latest, stable-v2.17.6)	3m 27s
Go: tracing with custom build steps (ubuntu-latest, stable-v2.19.4)	1m 15s
Go: tracing with custom build steps (macos-latest, stable-v2.18.4)	2m 46s
Go: tracing with custom build steps (macos-latest, stable-v2.19.4)	2m 5s
Go: tracing with custom build steps (ubuntu-latest, stable-v2.18.4)	1m 16s
Go: tracing with custom build steps (ubuntu-latest, stable-v2.17.6)	1m 33s
Go: tracing with custom build steps (macos-latest, stable-v2.21.4)	2m 53s
Go: tracing with custom build steps (ubuntu-latest, nightly-latest)	1m 7s
Go: tracing with custom build steps (ubuntu-latest, stable-v2.22.4)	1m 7s
Go: tracing with custom build steps (ubuntu-latest, linked)	1m 5s
Go: tracing with custom build steps (ubuntu-latest, stable-v2.20.7)	1m 3s
Go: tracing with custom build steps (macos-latest, nightly-latest)	2m 1s
Go: tracing with custom build steps (macos-latest, stable-v2.20.7)	2m 43s
Go: tracing with custom build steps (macos-latest, stable-v2.22.4)	2m 4s
Go: tracing with custom build steps (macos-latest, default)	2m 24s
Go: tracing with custom build steps (macos-latest, linked)	2m 54s
Go: tracing with custom build steps (ubuntu-latest, default)	1m 20s
Go: tracing with custom build steps (ubuntu-latest, stable-v2.21.4)	1m 10s
	34m 13s

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