feat(replay/v7): Upgrade rrweb packages to 2.15.0

[billyvg]

Pulls in a bunch of commits from rrweb upstream to address some outstanding perf issues

Backport of #11736

[github-actions]

size-limit report 📦

Path	Size
@sentry/browser (incl. Tracing, Replay, Feedback) - Webpack (gzipped)	80.76 KB (+0.05% 🔺)
@sentry/browser (incl. Tracing, Replay) - Webpack (gzipped)	71.75 KB (+0.09% 🔺)
@sentry/browser (incl. Tracing, Replay with Canvas) - Webpack (gzipped)	76 KB (+0.13% 🔺)
@sentry/browser (incl. Tracing, Replay) - Webpack with treeshaking flags (gzipped)	65.36 KB (+0.07% 🔺)
@sentry/browser (incl. Tracing) - Webpack (gzipped)	35.62 KB (+0.01% 🔺)
@sentry/browser (incl. browserTracingIntegration) - Webpack (gzipped)	35.5 KB (+0.01% 🔺)
@sentry/browser (incl. Feedback) - Webpack (gzipped)	31.57 KB (0%)
@sentry/browser (incl. sendFeedback) - Webpack (gzipped)	31.58 KB (0%)
@sentry/browser - Webpack (gzipped)	22.77 KB (-0.01% 🔽)
@sentry/browser (incl. Tracing, Replay, Feedback) - ES6 CDN Bundle (gzipped)	78.97 KB (+0.1% 🔺)
@sentry/browser (incl. Tracing, Replay) - ES6 CDN Bundle (gzipped)	70.34 KB (+0.11% 🔺)
@sentry/browser (incl. Tracing) - ES6 CDN Bundle (gzipped)	36.02 KB (0%)
@sentry/browser - ES6 CDN Bundle (gzipped)	25.28 KB (0%)
@sentry/browser (incl. Tracing, Replay) - ES6 CDN Bundle (minified & uncompressed)	221.41 KB (+0.08% 🔺)
@sentry/browser (incl. Tracing) - ES6 CDN Bundle (minified & uncompressed)	109.01 KB (0%)
@sentry/browser - ES6 CDN Bundle (minified & uncompressed)	75.79 KB (0%)
@sentry/browser (incl. Tracing) - ES5 CDN Bundle (gzipped)	39.3 KB (0%)
@sentry/react (incl. Tracing, Replay) - Webpack (gzipped)	72.25 KB (+0.09% 🔺)
@sentry/react - Webpack (gzipped)	22.81 KB (+0.01% 🔺)
@sentry/nextjs Client (incl. Tracing, Replay) - Webpack (gzipped)	90 KB (+0.1% 🔺)
@sentry/nextjs Client - Webpack (gzipped)	54.13 KB (0%)
@sentry-internal/feedback - Webpack (gzipped)	17.32 KB (0%)