Synchronize `PropagationContext` across layers

[bitsandfoxes]

Description

The native SDKs support receiving a trace ID. This would enhance the debug experience by sharing trace across the hybrid applications layers.

See

• feat: Allow Hybrid SDK to setTrace sentry-java#4137
• feat: Added enableTraceIdGeneration option sentry-java#4188
• feat: Allow Hybrid SDKs to setTrace sentry-cocoa#5081

[linear]

DART-282