fix(nextjs): Don't report NEXT_NOT_FOUND and NEXT_REDIRECT errors

[lforst]

Fixes #7641

Reduces error spam by not reporting NEXT_NOT_FOUND and NEXT_REDIRECT errors which get thrown when users use the redirect() or notFound() functions that Next.js exports via next/navigation:

• https://beta.nextjs.org/docs/api-reference/notfound
• https://beta.nextjs.org/docs/api-reference/redirect

[github-actions]

size-limit report 📦

Path	Size
@sentry/browser - ES5 CDN Bundle (gzipped + minified)	20.62 KB (0%)
@sentry/browser - ES5 CDN Bundle (minified)	64.4 KB (0%)
@sentry/browser - ES6 CDN Bundle (gzipped + minified)	19.16 KB (+0.01% 🔺)
@sentry/browser - ES6 CDN Bundle (minified)	56.78 KB (0%)
@sentry/browser - Webpack (gzipped + minified)	21.53 KB (0%)
@sentry/browser - Webpack (minified)	72 KB (0%)
@sentry/react - Webpack (gzipped + minified)	21.55 KB (0%)
@sentry/nextjs Client - Webpack (gzipped + minified)	51.98 KB (0%)
@sentry/browser + @sentry/tracing - ES5 CDN Bundle (gzipped + minified)	28.16 KB (+0.01% 🔺)
@sentry/browser + @sentry/tracing - ES6 CDN Bundle (gzipped + minified)	26.36 KB (0%)
@sentry/replay ES6 CDN Bundle (gzipped + minified)	44.74 KB (+0.01% 🔺)
@sentry/replay - Webpack (gzipped + minified)	38.86 KB (0%)
@sentry/browser + @sentry/tracing + @sentry/replay - ES6 CDN Bundle (gzipped + minified)	63.41 KB (+0.01% 🔺)
@sentry/browser + @sentry/replay - ES6 CDN Bundle (gzipped + minified)	56.49 KB (+0.01% 🔺)