fix(relay): add SO_REUSEPORT flag to enable smooth restarts #16797

Job	Run time
Lint	3m 3s
Lint Rust Default Features	1m 26s
Test (macos-latest)	2m 16s
Test (windows-latest)	5m 57s
Test All Features (ubuntu-latest)	3m 34s
Setup build metadata	1s
Test Python	1m 8s
Integration Tests	8m 46s
Build Relay Binary (relay, x86_64-unknown-linux-gnu)	8m 29s
Build Docker Image (relay)	46s
Sentry-Relay Integration Tests	11m 20s
Publish Relay to DockerHub	0s
self-hosted-end-to-end	14m 21s
Upload build artifacts to gocd	0s
Publish Relay to GCR	0s
	1h 1m 7s

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