fix(react/v7): Fix react router v4/v5 span names

[mydea]

Turns out we were not correctly setting parametrized route names for react router v4/v5 😬

Backport of #11855

Fixes #11938

[github-actions]

size-limit report 📦

Path	Size
@sentry/browser (incl. Tracing, Replay, Feedback) - Webpack (gzipped)	80.82 KB (+0.02% 🔺)
@sentry/browser (incl. Tracing, Replay) - Webpack (gzipped)	71.76 KB (+0.02% 🔺)
@sentry/browser (incl. Tracing, Replay with Canvas) - Webpack (gzipped)	76.01 KB (+0.02% 🔺)
@sentry/browser (incl. Tracing, Replay) - Webpack with treeshaking flags (gzipped)	65.38 KB (+0.02% 🔺)
@sentry/browser (incl. Tracing) - Webpack (gzipped)	35.64 KB (+0.05% 🔺)
@sentry/browser (incl. browserTracingIntegration) - Webpack (gzipped)	35.53 KB (+0.06% 🔺)
@sentry/browser (incl. Feedback) - Webpack (gzipped)	31.6 KB (0%)
@sentry/browser (incl. sendFeedback) - Webpack (gzipped)	31.61 KB (0%)
@sentry/browser - Webpack (gzipped)	22.78 KB (0%)
@sentry/browser (incl. Tracing, Replay, Feedback) - ES6 CDN Bundle (gzipped)	79.03 KB (+0.04% 🔺)
@sentry/browser (incl. Tracing, Replay) - ES6 CDN Bundle (gzipped)	70.37 KB (+0.03% 🔺)
@sentry/browser (incl. Tracing) - ES6 CDN Bundle (gzipped)	36.05 KB (+0.07% 🔺)
@sentry/browser - ES6 CDN Bundle (gzipped)	25.28 KB (0%)
@sentry/browser (incl. Tracing, Replay) - ES6 CDN Bundle (minified & uncompressed)	221.48 KB (+0.03% 🔺)
@sentry/browser (incl. Tracing) - ES6 CDN Bundle (minified & uncompressed)	109.08 KB (+0.05% 🔺)
@sentry/browser - ES6 CDN Bundle (minified & uncompressed)	75.81 KB (0%)
@sentry/browser (incl. Tracing) - ES5 CDN Bundle (gzipped)	39.33 KB (+0.06% 🔺)
@sentry/react (incl. Tracing, Replay) - Webpack (gzipped)	72.27 KB (+0.03% 🔺)
@sentry/react - Webpack (gzipped)	22.81 KB (0%)
@sentry/nextjs Client (incl. Tracing, Replay) - Webpack (gzipped)	90.02 KB (+0.02% 🔺)
@sentry/nextjs Client - Webpack (gzipped)	54.15 KB (+0.03% 🔺)
@sentry-internal/feedback - Webpack (gzipped)	17.34 KB (0%)