fix(v7): Ensure next & sveltekit correctly handle browserTracingIntegration

[mydea]

Fixes #11627

[github-actions]

size-limit report 📦

Path	Size
@sentry/browser (incl. Tracing, Replay, Feedback) - Webpack (gzipped)	80.59 KB (+0.03% 🔺)
@sentry/browser (incl. Tracing, Replay) - Webpack (gzipped)	71.57 KB (+0.04% 🔺)
@sentry/browser (incl. Tracing, Replay with Canvas) - Webpack (gzipped)	75.59 KB (+0.03% 🔺)
@sentry/browser (incl. Tracing, Replay) - Webpack with treeshaking flags (gzipped)	65.2 KB (+0.03% 🔺)
@sentry/browser (incl. Tracing) - Webpack (gzipped)	35.51 KB (+0.05% 🔺)
@sentry/browser (incl. browserTracingIntegration) - Webpack (gzipped)	35.39 KB (+0.06% 🔺)
@sentry/browser (incl. Feedback) - Webpack (gzipped)	31.57 KB (0%)
@sentry/browser (incl. sendFeedback) - Webpack (gzipped)	31.58 KB (0%)
@sentry/browser - Webpack (gzipped)	22.78 KB (0%)
@sentry/browser (incl. Tracing, Replay, Feedback) - ES6 CDN Bundle (gzipped)	78.77 KB (+0.01% 🔺)
@sentry/browser (incl. Tracing, Replay) - ES6 CDN Bundle (gzipped)	70.13 KB (+0.02% 🔺)
@sentry/browser (incl. Tracing) - ES6 CDN Bundle (gzipped)	35.9 KB (+0.03% 🔺)
@sentry/browser - ES6 CDN Bundle (gzipped)	25.27 KB (0%)
@sentry/browser (incl. Tracing, Replay) - ES6 CDN Bundle (minified & uncompressed)	220.82 KB (+0.05% 🔺)
@sentry/browser (incl. Tracing) - ES6 CDN Bundle (minified & uncompressed)	108.63 KB (+0.1% 🔺)
@sentry/browser - ES6 CDN Bundle (minified & uncompressed)	75.79 KB (0%)
@sentry/browser (incl. Tracing) - ES5 CDN Bundle (gzipped)	39.18 KB (+0.03% 🔺)
@sentry/react (incl. Tracing, Replay) - Webpack (gzipped)	72.06 KB (+0.04% 🔺)
@sentry/react - Webpack (gzipped)	22.81 KB (0%)
@sentry/nextjs Client (incl. Tracing, Replay) - Webpack (gzipped)	89.89 KB (+0.02% 🔺)
@sentry/nextjs Client - Webpack (gzipped)	54.04 KB (+0.06% 🔺)
@sentry-internal/feedback - Webpack (gzipped)	17.32 KB (0%)