ref(system): Instrument spawned tasks #14643

Job	Run time
Lint	3m 15s
Lint Rust Default Features	1m 22s
Test (macos-latest)	3m 6s
Test (windows-latest)	10m 5s
Setup build metadata	1s
Test All Features (ubuntu-latest)	3m 37s
Test Python	1m 5s
Integration Tests	11m 50s
Build Relay Binary (relay, x86_64-unknown-linux-gnu)	7m 30s
Build Docker Image (relay)	40s
Sentry-Relay Integration Tests	10m 30s
self-hosted-end-to-end	13m 26s
Publish Relay to DockerHub	0s
Upload build artifacts to gocd	0s
Publish Relay to GCR	0s
	1h 6m 27s

Provide feedback