ref: Make scope setters on hub only write to isolation scope

[lforst]

Makes the global setX() functions only write to the isolation scope. Previously they wrote to both, the current scope, and the isolation scope, in the future we want these methods to only write to the isolation scope. Up until now this would have been breaking behaviour but now we can go through with it.

[github-actions]

size-limit report 📦

Path	Size
@sentry/browser (incl. Tracing, Replay, Feedback) - Webpack (gzipped)	78.14 KB (-0.25% 🔽)
@sentry/browser (incl. Tracing, Replay) - Webpack (gzipped)	69.35 KB (-0.32% 🔽)
@sentry/browser (incl. Tracing, Replay with Canvas) - Webpack (gzipped)	73.29 KB (-0.28% 🔽)
@sentry/browser (incl. Tracing, Replay) - Webpack with treeshaking flags (gzipped)	62.99 KB (-0.3% 🔽)
@sentry/browser (incl. Tracing) - Webpack (gzipped)	33.32 KB (-0.6% 🔽)
@sentry/browser (incl. browserTracingIntegration) - Webpack (gzipped)	33.19 KB (-0.6% 🔽)
@sentry/browser (incl. Feedback) - Webpack (gzipped)	31.18 KB (-0.6% 🔽)
@sentry/browser (incl. sendFeedback) - Webpack (gzipped)	31.19 KB (-0.61% 🔽)
@sentry/browser - Webpack (gzipped)	22.46 KB (-0.79% 🔽)
@sentry/browser (incl. Tracing, Replay, Feedback) - ES6 CDN Bundle (gzipped)	76.16 KB (-0.27% 🔽)
@sentry/browser (incl. Tracing, Replay) - ES6 CDN Bundle (gzipped)	67.69 KB (-0.31% 🔽)
@sentry/browser (incl. Tracing) - ES6 CDN Bundle (gzipped)	33.45 KB (-0.64% 🔽)
@sentry/browser - ES6 CDN Bundle (gzipped)	24.54 KB (-0.79% 🔽)
@sentry/browser (incl. Tracing, Replay) - ES6 CDN Bundle (minified & uncompressed)	213.51 KB (-0.27% 🔽)
@sentry/browser (incl. Tracing) - ES6 CDN Bundle (minified & uncompressed)	101.31 KB (-0.56% 🔽)
@sentry/browser - ES6 CDN Bundle (minified & uncompressed)	73.69 KB (-0.77% 🔽)
@sentry/browser (incl. Tracing) - ES5 CDN Bundle (gzipped)	36.61 KB (-0.5% 🔽)
@sentry/react (incl. Tracing, Replay) - Webpack (gzipped)	69.74 KB (-0.27% 🔽)
@sentry/react - Webpack (gzipped)	22.5 KB (-0.76% 🔽)
@sentry/nextjs Client (incl. Tracing, Replay) - Webpack (gzipped)	87.31 KB (-0.28% 🔽)
@sentry/nextjs Client - Webpack (gzipped)	51.49 KB (-0.45% 🔽)
@sentry-internal/feedback - Webpack (gzipped)	17.17 KB (-0.27% 🔽)