feat(opentelemetry): Export getRequestSpanData

[mydea]

Instead of exporting _INTERNAL here, it's OK IMHO to export this. The API is stable enough.

[github-actions]

size-limit report 📦

Path	Size
@sentry/browser	22.1 KB (0%)
@sentry/browser (incl. Tracing)	31.71 KB (0%)
@sentry/browser (incl. Tracing, Replay)	66.92 KB (0%)
@sentry/browser (incl. Tracing, Replay) - with treeshaking flags	60.52 KB (0%)
@sentry/browser (incl. Tracing, Replay with Canvas)	70.75 KB (0%)
@sentry/browser (incl. Tracing, Replay, Feedback)	75.67 KB (0%)
@sentry/browser (incl. Feedback)	30.87 KB (0%)
@sentry/browser (incl. Feedback, Feedback Modal)	30.88 KB (0%)
@sentry/browser (incl. Feedback, Feedback Modal, Feedback Screenshot)	30.89 KB (0%)
@sentry/browser (incl. sendFeedback)	26.88 KB (0%)
@sentry/react	24.78 KB (0%)
@sentry/react (incl. Tracing)	34.61 KB (0%)
@sentry/vue	25.53 KB (0%)
@sentry/vue (incl. Tracing)	33.44 KB (0%)
@sentry/svelte	22.23 KB (0%)
CDN Bundle	24.11 KB (0%)
CDN Bundle (incl. Tracing)	32.66 KB (0%)
CDN Bundle (incl. Tracing, Replay)	66.37 KB (0%)
CDN Bundle (incl. Tracing, Replay, Feedback)	71.63 KB (0%)
CDN Bundle - uncompressed	71.67 KB (0%)
CDN Bundle (incl. Tracing) - uncompressed	97.71 KB (0%)
CDN Bundle (incl. Tracing, Replay) - uncompressed	207.1 KB (0%)
@sentry/nextjs (client)	33.8 KB (0%)
@sentry/sveltekit (client)	32.24 KB (0%)
@sentry/node	120.03 KB (+0.07% 🔺)