feat(nextjs): Mark errors caught from NextJS wrappers as unhandled

[Lms24]

This PR is part of a series of PRs adjusting the exception mechanism's handled value.

For more details see #8890

Changed Instrumentation

This PR addresses the mechanisms set in the NextJS package, more concretely in

• captureUnderscoreException
• wrapApiHandlerWithSentry
• callDataFetcherTraced
• withErrorInstrumentation
• wrapServerComponentWithSentry

ref #6073

[github-actions]

size-limit report 📦

Path	Size
@sentry/browser (incl. Tracing, Replay) - Webpack (gzipped)	75.28 KB (0%)
@sentry/browser (incl. Tracing) - Webpack (gzipped)	31.25 KB (0%)
@sentry/browser - Webpack (gzipped)	21.86 KB (0%)
@sentry/browser (incl. Tracing, Replay) - ES6 CDN Bundle (gzipped)	69.8 KB (0%)
@sentry/browser (incl. Tracing) - ES6 CDN Bundle (gzipped)	28.2 KB (-0.01% 🔽)
@sentry/browser - ES6 CDN Bundle (gzipped)	20.19 KB (-0.01% 🔽)
@sentry/browser (incl. Tracing, Replay) - ES6 CDN Bundle (minified & uncompressed)	220.32 KB (0%)
@sentry/browser (incl. Tracing) - ES6 CDN Bundle (minified & uncompressed)	85.13 KB (0%)
@sentry/browser - ES6 CDN Bundle (minified & uncompressed)	59.84 KB (0%)
@sentry/browser (incl. Tracing) - ES5 CDN Bundle (gzipped)	31.1 KB (-0.01% 🔽)
@sentry/react (incl. Tracing, Replay) - Webpack (gzipped)	75.3 KB (0%)
@sentry/react - Webpack (gzipped)	21.89 KB (0%)
@sentry/nextjs Client (incl. Tracing, Replay) - Webpack (gzipped)	93.16 KB (+0.01% 🔺)
@sentry/nextjs Client - Webpack (gzipped)	50.8 KB (+0.01% 🔺)

[Lms24]

Back to draft, we're probably missing a few places here...