Tracing without Performance

[kahest]

See Project: getsentry/team-sdks#5
See Project Board: github.com/orgs/getsentry/projects/110

Note: implementation details/requirements for Mobile (vs. backend) SDKs TBD. PR for Java can act as reference: getsentry/sentry-java#2788

[bitsandfoxes]

Received with 3.35.0