Tolerate `NoSourceCodeSeen` errors for CCR #6718

Job	Run time
Go: tracing with custom build steps (ubuntu-latest, stable-v2.17.6)	1m 10s
Go: tracing with custom build steps (macos-latest, default)	2m 38s
Go: tracing with custom build steps (macos-latest, stable-v2.22.4)	2m 20s
Go: tracing with custom build steps (macos-latest, nightly-latest)	3m 25s
Go: tracing with custom build steps (macos-latest, stable-v2.17.6)	3m 3s
Go: tracing with custom build steps (macos-latest, stable-v2.21.4)	2m 9s
Go: tracing with custom build steps (ubuntu-latest, stable-v2.19.4)	1m 21s
Go: tracing with custom build steps (macos-latest, stable-v2.20.7)	3m 26s
Go: tracing with custom build steps (macos-latest, stable-v2.18.4)	3m 9s
Go: tracing with custom build steps (ubuntu-latest, default)	1m 3s
Go: tracing with custom build steps (macos-latest, stable-v2.19.4)	2m 51s
Go: tracing with custom build steps (ubuntu-latest, stable-v2.20.7)	1m 5s
Go: tracing with custom build steps (ubuntu-latest, stable-v2.22.4)	1m 8s
Go: tracing with custom build steps (ubuntu-latest, stable-v2.21.4)	1m 3s
Go: tracing with custom build steps (macos-latest, linked)	2m 2s
Go: tracing with custom build steps (ubuntu-latest, stable-v2.18.4)	1m 9s
Go: tracing with custom build steps (ubuntu-latest, linked)	56s
Go: tracing with custom build steps (ubuntu-latest, nightly-latest)	54s
	34m 52s

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