feat(node-experimental): Use new Propagator for OTEL Spans

[mydea]

This fixes the propagator for node-experimental.

The "old" propagator from opentelemetry-node relies on having a transaction for the active span etc, which we don't have anymore. So the propagator never attached the correct stuff etc.

So now there is a new propagator for node-experimental:

• Instead of keeping DSC & TraceparentData on the OTEL Context, we just keep the PropagationContext (which includes the DSC...)
• Add an E2E test to make sure we attach the outgoing header correctly

[github-actions]

size-limit report 📦

Path	Size
@sentry/browser (incl. Tracing, Replay) - Webpack (gzipped)	84.22 KB (0%)
@sentry/browser (incl. Tracing) - Webpack (gzipped)	31.41 KB (0%)
@sentry/browser - Webpack (gzipped)	22 KB (0%)
@sentry/browser (incl. Tracing, Replay) - ES6 CDN Bundle (gzipped)	78.78 KB (0%)
@sentry/browser (incl. Tracing) - ES6 CDN Bundle (gzipped)	28.6 KB (0%)
@sentry/browser - ES6 CDN Bundle (gzipped)	21.02 KB (+0.01% 🔺)
@sentry/browser (incl. Tracing, Replay) - ES6 CDN Bundle (minified & uncompressed)	254.47 KB (0%)
@sentry/browser (incl. Tracing) - ES6 CDN Bundle (minified & uncompressed)	86.75 KB (0%)
@sentry/browser - ES6 CDN Bundle (minified & uncompressed)	62.44 KB (0%)
@sentry/browser (incl. Tracing) - ES5 CDN Bundle (gzipped)	31.46 KB (0%)
@sentry/react (incl. Tracing, Replay) - Webpack (gzipped)	84.25 KB (0%)
@sentry/react - Webpack (gzipped)	22.05 KB (0%)
@sentry/nextjs Client (incl. Tracing, Replay) - Webpack (gzipped)	102.22 KB (0%)
@sentry/nextjs Client - Webpack (gzipped)	50.99 KB (0%)

[Lms24]

Sounds reasonable to me!