ref: Refactor remaining makeMain usage

[mydea]

Instead, use a combination of setCurrentClient() and client.init().

I also refactored the domain ACS to avoid using the hub on the carrier (removing this overall will happen in a follow up PR).

I also removed the tracing hub test as that should be covered in other places and uses a lot of internal hub stuff etc.

[github-actions]

size-limit report 📦

Path	Size
@sentry/browser (incl. Tracing, Replay, Feedback) - Webpack (gzipped)	77.89 KB (0%)
@sentry/browser (incl. Tracing, Replay) - Webpack (gzipped)	69.17 KB (0%)
@sentry/browser (incl. Tracing, Replay with Canvas) - Webpack (gzipped)	73.1 KB (0%)
@sentry/browser (incl. Tracing, Replay) - Webpack with treeshaking flags (gzipped)	62.75 KB (0%)
@sentry/browser (incl. Tracing) - Webpack (gzipped)	33.36 KB (0%)
@sentry/browser (incl. browserTracingIntegration) - Webpack (gzipped)	33.26 KB (0%)
@sentry/browser (incl. Feedback) - Webpack (gzipped)	31.23 KB (0%)
@sentry/browser (incl. sendFeedback) - Webpack (gzipped)	31.24 KB (0%)
@sentry/browser - Webpack (gzipped)	22.49 KB (0%)
@sentry/browser (incl. Tracing, Replay, Feedback) - ES6 CDN Bundle (gzipped)	76.26 KB (0%)
@sentry/browser (incl. Tracing, Replay) - ES6 CDN Bundle (gzipped)	67.76 KB (0%)
@sentry/browser (incl. Tracing) - ES6 CDN Bundle (gzipped)	33.7 KB (0%)
@sentry/browser - ES6 CDN Bundle (gzipped)	24.8 KB (0%)
@sentry/browser (incl. Tracing, Replay) - ES6 CDN Bundle (minified & uncompressed)	213.19 KB (0%)
@sentry/browser (incl. Tracing) - ES6 CDN Bundle (minified & uncompressed)	101.81 KB (0%)
@sentry/browser - ES6 CDN Bundle (minified & uncompressed)	74.31 KB (0%)
@sentry/browser (incl. Tracing) - ES5 CDN Bundle (gzipped)	36.94 KB (0%)
@sentry/react (incl. Tracing, Replay) - Webpack (gzipped)	69.49 KB (0%)
@sentry/react - Webpack (gzipped)	22.52 KB (0%)
@sentry/nextjs Client (incl. Tracing, Replay) - Webpack (gzipped)	86.98 KB (0%)
@sentry/nextjs Client - Webpack (gzipped)	50.19 KB (0%)
@sentry-internal/feedback - Webpack (gzipped)	17.22 KB (0%)

[mydea]

OK, we can't remove this yet, as vite-plugin v0.6 uses this, which breaks sveltekit tests (which pulls this in and uses this...) and bumping vite-plugins is not that trivial. So I'll instead refactor this to be a noop for now, then once we bumped vite-plugin we can fully remove this.