fix(node): Revert to using upstream @fastify/otel instrumentation

[andreiborza]

With #16256 we switched from upstream @fastify/otel to a Otel v1 downgraded fork to ensure dependencies are aligned with our node sdk.

This PR will re-introduce a warning about unmet dependencies #16245 for the time being.

[github-actions]

size-limit report 📦

Path	Size	% Change	Change
@sentry/browser	24.04 kB	-	-
@sentry/browser - with treeshaking flags	23.7 kB	-	-
@sentry/browser (incl. Tracing)	38.46 kB	-	-
@sentry/browser (incl. Tracing, Replay)	76.58 kB	-	-
@sentry/browser (incl. Tracing, Replay) - with treeshaking flags	69.61 kB	-	-
@sentry/browser (incl. Tracing, Replay with Canvas)	81.35 kB	-	-
@sentry/browser (incl. Tracing, Replay, Feedback)	93.46 kB	-	-
@sentry/browser (incl. Feedback)	40.83 kB	-	-
@sentry/browser (incl. sendFeedback)	28.79 kB	-	-
@sentry/browser (incl. FeedbackAsync)	33.66 kB	-	-
@sentry/react	25.86 kB	-	-
@sentry/react (incl. Tracing)	40.48 kB	-	-
@sentry/vue	28.44 kB	-	-
@sentry/vue (incl. Tracing)	40.28 kB	-	-
@sentry/svelte	24.07 kB	-	-
CDN Bundle	25.25 kB	-	-
CDN Bundle (incl. Tracing)	38.54 kB	-	-
CDN Bundle (incl. Tracing, Replay)	74.32 kB	-	-
CDN Bundle (incl. Tracing, Replay, Feedback)	79.77 kB	-	-
CDN Bundle - uncompressed	73.68 kB	-	-
CDN Bundle (incl. Tracing) - uncompressed	114.08 kB	-	-
CDN Bundle (incl. Tracing, Replay) - uncompressed	228.05 kB	-	-
CDN Bundle (incl. Tracing, Replay, Feedback) - uncompressed	240.87 kB	-	-
@sentry/nextjs (client)	42.08 kB	-	-
@sentry/sveltekit (client)	38.95 kB	-	-
@sentry/node	155.36 kB	-1.77%	-2.8 kB 🔽
@sentry/node - without tracing	98.07 kB	-	-
@sentry/aws-serverless	123.41 kB	-	-

View base workflow run

[andreiborza]

Closing this after some discussions in the team as it would just replace one problem with another one. We'll wait for the fork being vendored in.