fix(spans): Do not trim essential fields #13880

Job	Run time
Test (macos-latest)	2m 27s
Lint	2m 48s
Setup build metadata	1s
Lint Rust Default Features	1m 33s
Test (windows-latest)	9m 33s
Test All Features (ubuntu-latest)	3m 35s
Test Python	1m 4s
Integration Tests	17m 32s
Build Relay Binary (relay, x86_64-unknown-linux-gnu)	5m 51s
Build Docker Image (relay)	42s
Sentry-Relay Integration Tests	15m 1s
Publish Relay to DockerHub	0s
self-hosted-end-to-end	13m 23s
Publish Relay to GCR	0s
Upload build artifacts to gocd	0s
	1h 13m 30s

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