feat(core): Deprecate the Hub constructor

[lforst]

We sorta missed to deprecate the Hub constructor. In the upcoming versions the hub will not be able to instantiated manually anymore. Instead users should use client and scope APIs.

Removing all that hub usage is gonna be fun.

[github-actions]

size-limit report 📦

Path	Size
@sentry/browser (incl. Tracing, Replay, Feedback) - Webpack (gzipped)	78.16 KB (-0.22% 🔽)
@sentry/browser (incl. Tracing, Replay) - Webpack (gzipped)	69.37 KB (-0.29% 🔽)
@sentry/browser (incl. Tracing, Replay with Canvas) - Webpack (gzipped)	73.31 KB (-0.25% 🔽)
@sentry/browser (incl. Tracing, Replay) - Webpack with treeshaking flags (gzipped)	63.01 KB (-0.26% 🔽)
@sentry/browser (incl. Tracing) - Webpack (gzipped)	33.35 KB (-0.5% 🔽)
@sentry/browser (incl. browserTracingIntegration) - Webpack (gzipped)	33.22 KB (-0.51% 🔽)
@sentry/browser (incl. Feedback) - Webpack (gzipped)	31.2 KB (-0.54% 🔽)
@sentry/browser (incl. sendFeedback) - Webpack (gzipped)	31.21 KB (-0.53% 🔽)
@sentry/browser - Webpack (gzipped)	22.48 KB (-0.69% 🔽)
@sentry/browser (incl. Tracing, Replay, Feedback) - ES6 CDN Bundle (gzipped)	76.19 KB (-0.23% 🔽)
@sentry/browser (incl. Tracing, Replay) - ES6 CDN Bundle (gzipped)	67.71 KB (-0.28% 🔽)
@sentry/browser (incl. Tracing) - ES6 CDN Bundle (gzipped)	33.47 KB (-0.56% 🔽)
@sentry/browser - ES6 CDN Bundle (gzipped)	24.56 KB (-0.7% 🔽)
@sentry/browser (incl. Tracing, Replay) - ES6 CDN Bundle (minified & uncompressed)	213.68 KB (-0.19% 🔽)
@sentry/browser (incl. Tracing) - ES6 CDN Bundle (minified & uncompressed)	101.48 KB (-0.39% 🔽)
@sentry/browser - ES6 CDN Bundle (minified & uncompressed)	73.86 KB (-0.54% 🔽)
@sentry/browser (incl. Tracing) - ES5 CDN Bundle (gzipped)	36.64 KB (-0.44% 🔽)
@sentry/react (incl. Tracing, Replay) - Webpack (gzipped)	69.76 KB (-0.24% 🔽)
@sentry/react - Webpack (gzipped)	22.52 KB (-0.66% 🔽)
@sentry/nextjs Client (incl. Tracing, Replay) - Webpack (gzipped)	87.33 KB (-0.26% 🔽)
@sentry/nextjs Client - Webpack (gzipped)	51.52 KB (-0.41% 🔽)
@sentry-internal/feedback - Webpack (gzipped)	17.2 KB (-0.1% 🔽)

[lforst]

why on earth is the typing failing in ci but not locally .....