ref(tracing): Re-organize exports for node/browser

[AbhiPrasad]

In prep for #5815, let's re-organize the exports for node/browser in @sentry/tracing.

There are now 3 main exports from @sentry/tracing:

// has hub extensions side effectimport*asTracingfrom'@sentry/tracing';// no side effectimport{BrowserTracing}from'@sentry/tracing/browser';// no side effectimport{Prisma}from'@sentry/tracing/node';

[github-actions]

size-limit report 📦

Path	Size
@sentry/browser - ES5 CDN Bundle (gzipped + minified)	20.12 KB (-0.01% 🔽)
@sentry/browser - ES5 CDN Bundle (minified)	62.55 KB (0%)
@sentry/browser - ES6 CDN Bundle (gzipped + minified)	18.76 KB (-0.02% 🔽)
@sentry/browser - ES6 CDN Bundle (minified)	55.53 KB (0%)
@sentry/browser - Webpack (gzipped + minified)	20.5 KB (0%)
@sentry/browser - Webpack (minified)	66.99 KB (0%)
@sentry/react - Webpack (gzipped + minified)	20.53 KB (0%)
@sentry/nextjs Client - Webpack (gzipped + minified)	48.2 KB (0%)
@sentry/browser + @sentry/tracing - ES5 CDN Bundle (gzipped + minified)	27.2 KB (+0.01% 🔺)
@sentry/browser + @sentry/tracing - ES6 CDN Bundle (gzipped + minified)	25.46 KB (+0.01% 🔺)
@sentry/replay ES6 CDN Bundle (gzipped + minified)	43.06 KB (0%)
@sentry/replay - Webpack (gzipped + minified)	37.1 KB (0%)
@sentry/browser + @sentry/tracing + @sentry/replay - ES6 CDN Bundle (gzipped + minified)	60.8 KB (0%)
@sentry/browser + @sentry/replay - ES6 CDN Bundle (gzipped + minified)	54.19 KB (0%)