ref(metrics): Remodel metric submission flow #14777

Job	Run time
Lint	2m 55s
Lint Rust Default Features	1m 36s
Test (macos-latest)	2m 14s
Test (windows-latest)	5m 28s
Test All Features (ubuntu-latest)	4m 15s
Test Python	1m 18s
Setup build metadata	1s
Integration Tests	13m 22s
Build Relay Binary (relay, x86_64-unknown-linux-gnu)	8m 7s
Build Docker Image (relay)	41s
Publish Relay to DockerHub	0s
Sentry-Relay Integration Tests	9m 8s
self-hosted-end-to-end	13m 1s
Publish Relay to GCR	0s
Upload build artifacts to gocd	0s
	1h 2m 6s

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