ref: Use getCurrentScope()/hub.getScope() instead of configureScope()

[mydea]

In preparation for #9841, as we want to deprecate configureScope, refactor our own usage of this away.

I used a new transformer of sentry-migr8 for this, which did most of the heavy lifting. I only needed to fix the block usage (which is more a stylistic issue than an actual problem).

In some follow up, I'll also create a migr8 transform to refactor hub usage away, to e.g. refactor getCurrentHub().getScope() to getCurrentScope() etc. But for now this is OK I think.

[github-actions]

size-limit report 📦

Path	Size
@sentry/browser (incl. Tracing, Replay, Feedback) - Webpack (gzipped)	75 KB (-0.06% 🔽)
@sentry/browser (incl. Tracing, Replay) - Webpack (gzipped)	66.38 KB (-0.02% 🔽)
@sentry/browser (incl. Tracing, Replay) - Webpack with treeshaking flags (gzipped)	59.99 KB (-0.02% 🔽)
@sentry/browser (incl. Tracing) - Webpack (gzipped)	31.12 KB (-0.03% 🔽)
@sentry/browser (incl. Feedback) - Webpack (gzipped)	29.74 KB (0%)
@sentry/browser - Webpack (gzipped)	21.39 KB (0%)
@sentry/browser (incl. Tracing, Replay, Feedback) - ES6 CDN Bundle (gzipped)	71.6 KB (-0.01% 🔽)
@sentry/browser (incl. Tracing, Replay) - ES6 CDN Bundle (gzipped)	63.32 KB (-0.02% 🔽)
@sentry/browser (incl. Tracing) - ES6 CDN Bundle (gzipped)	29.66 KB (-0.02% 🔽)
@sentry/browser - ES6 CDN Bundle (gzipped)	21.72 KB (0%)
@sentry/browser (incl. Tracing, Replay) - ES6 CDN Bundle (minified & uncompressed)	199.56 KB (-0.01% 🔽)
@sentry/browser (incl. Tracing) - ES6 CDN Bundle (minified & uncompressed)	89.93 KB (-0.02% 🔽)
@sentry/browser - ES6 CDN Bundle (minified & uncompressed)	64.92 KB (0%)
@sentry/browser (incl. Tracing) - ES5 CDN Bundle (gzipped)	32.33 KB (-0.01% 🔽)
@sentry/react (incl. Tracing, Replay) - Webpack (gzipped)	66.74 KB (-0.01% 🔽)
@sentry/react - Webpack (gzipped)	21.44 KB (0%)
@sentry/nextjs Client (incl. Tracing, Replay) - Webpack (gzipped)	83.47 KB (-0.02% 🔽)
@sentry/nextjs Client - Webpack (gzipped)	48.22 KB (-0.03% 🔽)
@sentry-internal/feedback - Webpack (gzipped)	16.19 KB (0%)

[Lms24]

LGTM!
I can already see incoming version discrepancy issues 😅 (but there's not a lot we can do here as long as we don't bundle everything into one file, no worries)