fix(projects): Treat fetch failures as pending #16616

Job	Run time
Lint	3m 32s
Lint Rust Default Features	4m 31s
Setup build metadata	1s
Test (macos-latest)	2m 49s
Test All Features (ubuntu-latest)	3m 26s
Test (windows-latest)	5m 32s
Integration Tests	8m 50s
Test Python	58s
Build Relay Binary (relay, x86_64-unknown-linux-gnu)	7m 59s
Build Docker Image (relay)	29s
Sentry-Relay Integration Tests	11m 39s
Publish Relay to DockerHub	0s
self-hosted-end-to-end	14m 18s
Upload build artifacts to gocd	0s
Publish Relay to GCR	0s
	1h 4m 4s

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