feat(v8/tracing): Delete BrowserTracing class

[AbhiPrasad]

With this PR and #10918 merged, we can move all of the browser tracing related code into @sentry/browser. That will allow us to delete @sentry-internal/tracing and stop publishing it.

ref #9885

[github-actions]

size-limit report 📦

Path	Size
@sentry/browser (incl. Tracing, Replay, Feedback) - Webpack (gzipped)	77.15 KB (0%)
@sentry/browser (incl. Tracing, Replay) - Webpack (gzipped)	68.38 KB (0%)
@sentry/browser (incl. Tracing, Replay with Canvas) - Webpack (gzipped)	72.31 KB (0%)
@sentry/browser (incl. Tracing, Replay) - Webpack with treeshaking flags (gzipped)	61.93 KB (0%)
@sentry/browser (incl. Tracing) - Webpack (gzipped)	32.65 KB (0%)
@sentry/browser (incl. browserTracingIntegration) - Webpack (gzipped)	32.65 KB (0%)
@sentry/browser (incl. Feedback) - Webpack (gzipped)	31 KB (0%)
@sentry/browser (incl. sendFeedback) - Webpack (gzipped)	31.01 KB (0%)
@sentry/browser - Webpack (gzipped)	22.25 KB (0%)
@sentry/browser (incl. Tracing, Replay, Feedback) - ES6 CDN Bundle (gzipped)	75.31 KB (+0.01% 🔺)
@sentry/browser (incl. Tracing, Replay) - ES6 CDN Bundle (gzipped)	66.95 KB (-0.01% 🔽)
@sentry/browser (incl. Tracing) - ES6 CDN Bundle (gzipped)	32.84 KB (+0.01% 🔺)
@sentry/browser - ES6 CDN Bundle (gzipped)	23.82 KB (-0.02% 🔽)
@sentry/browser (incl. Tracing, Replay) - ES6 CDN Bundle (minified & uncompressed)	210.15 KB (0%)
@sentry/browser (incl. Tracing) - ES6 CDN Bundle (minified & uncompressed)	99.01 KB (0%)
@sentry/browser - ES6 CDN Bundle (minified & uncompressed)	71.03 KB (+0.01% 🔺)
@sentry/browser (incl. Tracing) - ES5 CDN Bundle (gzipped)	35.92 KB (0%)
@sentry/react (incl. Tracing, Replay) - Webpack (gzipped)	68.66 KB (0%)
@sentry/react - Webpack (gzipped)	22.28 KB (0%)
@sentry/nextjs Client (incl. Tracing, Replay) - Webpack (gzipped)	85.11 KB (0%)
@sentry/nextjs Client - Webpack (gzipped)	49.51 KB (0%)
@sentry-internal/feedback - Webpack (gzipped)	17.1 KB (0%)