chore(replay): Cleanup package.json scripts

[Lms24]

This PR cleans up the replay integration's package.json by getting rid of a few ToDos, enabling the circular dependency check and using the eslint cache of the monorepo.

Since the future of the demo app in the replay package is still unclear, I opted to repurpose and rename the bootstrap script so that it now only bootstraps the demo app. For the package itself, bootstrapping happens via a monorepo-level yarn command or lerna bootstrap command.

ref: #6280

[github-actions]

size-limit report 📦

Path	Size
@sentry/browser - ES5 CDN Bundle (gzipped + minified)	19.57 KB (-0.01% 🔽)
@sentry/browser - ES5 CDN Bundle (minified)	60.59 KB (0%)
@sentry/browser - ES6 CDN Bundle (gzipped + minified)	18.36 KB (+0.01% 🔺)
@sentry/browser - ES6 CDN Bundle (minified)	54.15 KB (0%)
@sentry/browser - Webpack (gzipped + minified)	20.12 KB (0%)
@sentry/browser - Webpack (minified)	65.75 KB (0%)
@sentry/react - Webpack (gzipped + minified)	20.14 KB (0%)
@sentry/nextjs Client - Webpack (gzipped + minified)	45.99 KB (0%)
@sentry/browser + @sentry/tracing - ES5 CDN Bundle (gzipped + minified)	26.45 KB (-0.01% 🔽)
@sentry/browser + @sentry/tracing - ES6 CDN Bundle (gzipped + minified)	24.88 KB (+0.03% 🔺)
@sentry/replay index.js	37.2 KB (-40.01% 🔽)
@sentry/replay - Webpack (gzipped + minified)	37.17 KB (-40.05% 🔽)
@sentry/replay - Webpack (minified)	124.99 KB (-37.31% 🔽)