feat(spans): extract country code into spans #14858

Job	Run time
Lint Rust Default Features	1m 44s
Setup build metadata	1s
Lint	3m 2s
Test (macos-latest)	2m 32s
Test (windows-latest)	6m 17s
Test Python	59s
Test All Features (ubuntu-latest)	3m 55s
Integration Tests	13m 10s
Build Relay Binary (relay, x86_64-unknown-linux-gnu)	7m 53s
Build Docker Image (relay)	26s
Sentry-Relay Integration Tests	11m 38s
Publish Relay to DockerHub	0s
Publish Relay to GCR	0s
Upload build artifacts to gocd	0s
self-hosted-end-to-end	13m 33s
	1h 5m 10s

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