test(nextjs): Add route handler tests for turbopack

[chargome]

Adds tests for tracing and exception handling in turbopack route handlers.

Note: this will fail until vercel/next.js#82612 is resolved

[github-actions]

node-overhead report 🧳

Note: This is a synthetic benchmark with a minimal express app and does not necessarily reflect the real-world performance impact in an application.

Scenario	Requests/s	% of Baseline	Prev. Requests/s	Change %
GET Baseline	8,953	-	8,640	+4%
GET With Sentry	1,326	15%	1,325	+0%
GET With Sentry (error only)	5,970	67%	5,913	+1%
POST Baseline	1,183	-	1,092	+8%
POST With Sentry	487	41%	482	+1%
POST With Sentry (error only)	1,033	87%	976	+6%
MYSQL Baseline	3,292	-	3,271	+1%
MYSQL With Sentry	386	12%	564	-32%
MYSQL With Sentry (error only)	2,678	81%	2,622	+2%

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[github-actions]

size-limit report 📦

Path	Size	% Change	Change
@sentry/browser	24.26 kB	-	-
@sentry/browser - with treeshaking flags	22.77 kB	-	-
@sentry/browser (incl. Tracing)	40.43 kB	-	-
@sentry/browser (incl. Tracing, Replay)	78.82 kB	-	-
@sentry/browser (incl. Tracing, Replay) - with treeshaking flags	68.48 kB	-	-
@sentry/browser (incl. Tracing, Replay with Canvas)	83.49 kB	-	-
@sentry/browser (incl. Tracing, Replay, Feedback)	95.69 kB	-	-
@sentry/browser (incl. Feedback)	40.97 kB	-	-
@sentry/browser (incl. sendFeedback)	28.91 kB	-	-
@sentry/browser (incl. FeedbackAsync)	33.84 kB	-	-
@sentry/react	25.98 kB	-	-
@sentry/react (incl. Tracing)	42.41 kB	-	-
@sentry/vue	28.78 kB	-	-
@sentry/vue (incl. Tracing)	42.24 kB	-	-
@sentry/svelte	24.29 kB	-	-
CDN Bundle	25.77 kB	-	-
CDN Bundle (incl. Tracing)	40.33 kB	-	-
CDN Bundle (incl. Tracing, Replay)	76.57 kB	-	-
CDN Bundle (incl. Tracing, Replay, Feedback)	82.06 kB	-	-
CDN Bundle - uncompressed	75.37 kB	-	-
CDN Bundle (incl. Tracing) - uncompressed	119.39 kB	-	-
CDN Bundle (incl. Tracing, Replay) - uncompressed	234.55 kB	-	-
CDN Bundle (incl. Tracing, Replay, Feedback) - uncompressed	247.31 kB	-	-
@sentry/nextjs (client)	44.42 kB	-	-
@sentry/sveltekit (client)	40.85 kB	-	-
@sentry/node-core	50.02 kB	+0.01%	+1 B 🔺
@sentry/node	153.06 kB	-0.01%	-1 B 🔽
@sentry/node - without tracing	91.94 kB	-0.01%	-1 B 🔽
@sentry/aws-serverless	105.39 kB	-	-

View base workflow run