fix(react): Relax React Router 6 RouteObject typing.

[onurtemizkan]

Fixes: #6264

• Added errorElement type to both NonIndexRouteObject and IndexRouteObject
• Also extended RouteObject with Record<string, any> to prevent such things breaking users' builds in the future.

[github-actions]

size-limit report 📦

Path	Size
@sentry/browser - ES5 CDN Bundle (gzipped + minified)	19.5 KB (-0.01% 🔽)
@sentry/browser - ES5 CDN Bundle (minified)	60.29 KB (0%)
@sentry/browser - ES6 CDN Bundle (gzipped + minified)	18.16 KB (+0.02% 🔺)
@sentry/browser - ES6 CDN Bundle (minified)	53.63 KB (0%)
@sentry/browser - Webpack (gzipped + minified)	19.9 KB (0%)
@sentry/browser - Webpack (minified)	65.12 KB (0%)
@sentry/react - Webpack (gzipped + minified)	19.92 KB (0%)
@sentry/nextjs Client - Webpack (gzipped + minified)	45.93 KB (0%)
@sentry/browser + @sentry/tracing - ES5 CDN Bundle (gzipped + minified)	26.37 KB (+0.01% 🔺)
@sentry/browser + @sentry/tracing - ES6 CDN Bundle (gzipped + minified)	24.78 KB (+0.02% 🔺)