feat(replay): Deprecate Replay, ReplayCanvas, Feedback classes

[mydea]

Instead, users should use the new functional styles.

Note that we'll probably actually un-deprecate Replay in some form in v8, as we'll be keeping the class around there for sure (as there is a lot of logic in there...). But users should not use it, so deprecating this now!

While at it, I also deprecated the old InitSentryForEmber method in favor of init().

It's slightly unfortunate that I missed this, but we probably shouldn't have exposed ReplayCanvas as a class anymore at all 😬 maybe we wait before we document this etc. until we merged the functional style. cc @billyvg

[github-actions]

size-limit report 📦

Path	Size
@sentry/browser (incl. Tracing, Replay, Feedback) - Webpack (gzipped)	77.69 KB (0%)
@sentry/browser (incl. Tracing, Replay) - Webpack (gzipped)	68.95 KB (0%)
@sentry/browser (incl. Tracing, Replay with Canvas) - Webpack (gzipped)	72.84 KB (0%)
@sentry/browser (incl. Tracing, Replay) - Webpack with treeshaking flags (gzipped)	62.58 KB (0%)
@sentry/browser (incl. Tracing) - Webpack (gzipped)	32.96 KB (0%)
@sentry/browser (incl. Feedback) - Webpack (gzipped)	31.18 KB (0%)
@sentry/browser (incl. sendFeedback) - Webpack (gzipped)	31.19 KB (0%)
@sentry/browser - Webpack (gzipped)	22.53 KB (0%)
@sentry/browser (incl. Tracing, Replay, Feedback) - ES6 CDN Bundle (gzipped)	75.36 KB (+0.04% 🔺)
@sentry/browser (incl. Tracing, Replay) - ES6 CDN Bundle (gzipped)	67 KB (+0.05% 🔺)
@sentry/browser (incl. Tracing) - ES6 CDN Bundle (gzipped)	32.83 KB (+0.08% 🔺)
@sentry/browser - ES6 CDN Bundle (gzipped)	24.35 KB (+0.1% 🔺)
@sentry/browser (incl. Tracing, Replay) - ES6 CDN Bundle (minified & uncompressed)	211.04 KB (+0.04% 🔺)
@sentry/browser (incl. Tracing) - ES6 CDN Bundle (minified & uncompressed)	99.04 KB (+0.11% 🔺)
@sentry/browser - ES6 CDN Bundle (minified & uncompressed)	72.87 KB (+0.14% 🔺)
@sentry/browser (incl. Tracing) - ES5 CDN Bundle (gzipped)	35.92 KB (+0.08% 🔺)
@sentry/react (incl. Tracing, Replay) - Webpack (gzipped)	69.35 KB (0%)
@sentry/react - Webpack (gzipped)	22.58 KB (0%)
@sentry/nextjs Client (incl. Tracing, Replay) - Webpack (gzipped)	85.97 KB (0%)
@sentry/nextjs Client - Webpack (gzipped)	50.25 KB (0%)
@sentry-internal/feedback - Webpack (gzipped)	17.14 KB (0%)

[billyvg]

We should remember to update the usage of our class components inside of https://github.com/getsentry/getsentry after this is released (feedback + replay)