feat(react-router): Drop low-quality transactions via ignoreSpans

[nicohrubec]

Migrates the React Router low-quality transactions filter from a dedicated event-processor integration (lowQualityTransactionsFilterIntegration) to ignoreSpans so it also works in the streaming path. Adds some unit tests plus a new e2e test in react-router-7-framework that asserts no server transaction is sent for filtered /__manifest? requests during client-side navigation (no e2e covered this filter before).

Closes #20362

Stacked on #20513

[github-actions]

size-limit report 📦

Path	Size	% Change	Change
@sentry/browser	26.07 kB	+0.44%	+112 B 🔺
@sentry/browser - with treeshaking flags	24.55 kB	+0.46%	+110 B 🔺
@sentry/browser (incl. Tracing)	44.02 kB	+0.31%	+135 B 🔺
@sentry/browser (incl. Tracing + Span Streaming)	45.69 kB	+0.34%	+153 B 🔺
@sentry/browser (incl. Tracing, Profiling)	48.97 kB	+0.27%	+129 B 🔺
@sentry/browser (incl. Tracing, Replay)	83.23 kB	+0.17%	+141 B 🔺
@sentry/browser (incl. Tracing, Replay) - with treeshaking flags	72.71 kB	+0.17%	+121 B 🔺
@sentry/browser (incl. Tracing, Replay with Canvas)	87.9 kB	+0.16%	+137 B 🔺
@sentry/browser (incl. Tracing, Replay, Feedback)	100.52 kB	+0.15%	+144 B 🔺
@sentry/browser (incl. Feedback)	43.31 kB	+0.3%	+127 B 🔺
@sentry/browser (incl. sendFeedback)	30.88 kB	+0.37%	+112 B 🔺
@sentry/browser (incl. FeedbackAsync)	36.05 kB	+0.35%	+123 B 🔺
@sentry/browser (incl. Metrics)	27.36 kB	+0.42%	+113 B 🔺
@sentry/browser (incl. Logs)	27.5 kB	+0.46%	+125 B 🔺
@sentry/browser (incl. Metrics & Logs)	28.19 kB	+0.41%	+113 B 🔺
@sentry/react	27.82 kB	+0.37%	+102 B 🔺
@sentry/react (incl. Tracing)	46.26 kB	+0.28%	+126 B 🔺
@sentry/vue	30.94 kB	+0.42%	+127 B 🔺
@sentry/vue (incl. Tracing)	45.85 kB	+0.32%	+142 B 🔺
@sentry/svelte	26.09 kB	+0.43%	+110 B 🔺
CDN Bundle	28.75 kB	+0.32%	+91 B 🔺
CDN Bundle (incl. Tracing)	46.25 kB	+0.3%	+135 B 🔺
CDN Bundle (incl. Logs, Metrics)	30.14 kB	+0.37%	+110 B 🔺
CDN Bundle (incl. Tracing, Logs, Metrics)	47.31 kB	+0.31%	+143 B 🔺
CDN Bundle (incl. Replay, Logs, Metrics)	69.1 kB	+0.17%	+112 B 🔺
CDN Bundle (incl. Tracing, Replay)	83.3 kB	+0.14%	+113 B 🔺
CDN Bundle (incl. Tracing, Replay, Logs, Metrics)	84.33 kB	+0.14%	+113 B 🔺
CDN Bundle (incl. Tracing, Replay, Feedback)	89.12 kB	+0.14%	+122 B 🔺
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics)	90.17 kB	+0.13%	+115 B 🔺
CDN Bundle - uncompressed	84.32 kB	+0.48%	+402 B 🔺
CDN Bundle (incl. Tracing) - uncompressed	138.37 kB	+0.4%	+548 B 🔺
CDN Bundle (incl. Logs, Metrics) - uncompressed	88.46 kB	+0.46%	+402 B 🔺
CDN Bundle (incl. Tracing, Logs, Metrics) - uncompressed	141.78 kB	+0.39%	+548 B 🔺
CDN Bundle (incl. Replay, Logs, Metrics) - uncompressed	212.04 kB	+0.19%	+402 B 🔺
CDN Bundle (incl. Tracing, Replay) - uncompressed	255.81 kB	+0.22%	+548 B 🔺
CDN Bundle (incl. Tracing, Replay, Logs, Metrics) - uncompressed	259.21 kB	+0.22%	+548 B 🔺
CDN Bundle (incl. Tracing, Replay, Feedback) - uncompressed	269.51 kB	+0.21%	+548 B 🔺
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics) - uncompressed	272.89 kB	+0.21%	+548 B 🔺
@sentry/nextjs (client)	48.76 kB	+0.28%	+134 B 🔺
@sentry/sveltekit (client)	44.47 kB	+0.33%	+144 B 🔺
@sentry/node-core	58.65 kB	+0.23%	+130 B 🔺
@sentry/node	175.98 kB	+0.09%	+150 B 🔺
@sentry/node - without tracing	98.43 kB	+0.13%	+121 B 🔺
@sentry/aws-serverless	115.64 kB	+0.11%	+122 B 🔺

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