feat(server): Report unhealthy instead of terminating on panic #16352

Job	Run time
Test (macos-latest)	2m 15s
Lint Rust Default Features	1m 27s
Test (windows-latest)	6m 18s
Lint	3m 27s
Setup build metadata	1s
Test All Features (ubuntu-latest)	3m 48s
Test Python	51s
Integration Tests	11m 56s
Build Relay Binary (relay, x86_64-unknown-linux-gnu)	8m 13s
Build Docker Image (relay)	45s
Sentry-Relay Integration Tests	13m 31s
Publish Relay to DockerHub	0s
Upload build artifacts to gocd	0s
self-hosted-end-to-end	14m 13s
Publish Relay to GCR	0s
	1h 6m 45s

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