feat(v8/core): Remove span.instrumenter and instrumenter option

[AbhiPrasad]

ref #10677

Removes instrumenter from the span interface, and removes the instrumenter option from client options accordingly.

[github-actions]

size-limit report 📦

Path	Size
@sentry/browser (incl. Tracing, Replay, Feedback) - Webpack (gzipped)	77.29 KB (-0.29% 🔽)
@sentry/browser (incl. Tracing, Replay) - Webpack (gzipped)	68.56 KB (-0.33% 🔽)
@sentry/browser (incl. Tracing, Replay with Canvas) - Webpack (gzipped)	72.46 KB (-0.33% 🔽)
@sentry/browser (incl. Tracing, Replay) - Webpack with treeshaking flags (gzipped)	62.07 KB (-0.36% 🔽)
@sentry/browser (incl. Tracing) - Webpack (gzipped)	32.78 KB (-0.67% 🔽)
@sentry/browser (incl. browserTracingIntegration) - Webpack (gzipped)	32.78 KB (-0.35% 🔽)
@sentry/browser (incl. Feedback) - Webpack (gzipped)	30.91 KB (0%)
@sentry/browser (incl. sendFeedback) - Webpack (gzipped)	30.91 KB (0%)
@sentry/browser - Webpack (gzipped)	22.19 KB (0%)
@sentry/browser (incl. Tracing, Replay, Feedback) - ES6 CDN Bundle (gzipped)	75.78 KB (-0.3% 🔽)
@sentry/browser (incl. Tracing, Replay) - ES6 CDN Bundle (gzipped)	67.52 KB (-0.02% 🔽)
@sentry/browser (incl. Tracing) - ES6 CDN Bundle (gzipped)	33.31 KB (-0.42% 🔽)
@sentry/browser - ES6 CDN Bundle (gzipped)	24.72 KB (+0.02% 🔺)
@sentry/browser (incl. Tracing, Replay) - ES6 CDN Bundle (minified & uncompressed)	211.34 KB (-0.38% 🔽)
@sentry/browser (incl. Tracing) - ES6 CDN Bundle (minified & uncompressed)	100.06 KB (-0.8% 🔽)
@sentry/browser - ES6 CDN Bundle (minified & uncompressed)	73.78 KB (-0.22% 🔽)
@sentry/browser (incl. Tracing) - ES5 CDN Bundle (gzipped)	36.39 KB (-0.98% 🔽)
@sentry/react (incl. Tracing, Replay) - Webpack (gzipped)	68.85 KB (-0.35% 🔽)
@sentry/react - Webpack (gzipped)	22.22 KB (0%)
@sentry/nextjs Client (incl. Tracing, Replay) - Webpack (gzipped)	85.28 KB (-1.49% 🔽)
@sentry/nextjs Client - Webpack (gzipped)	49.69 KB (-0.24% 🔽)
@sentry-internal/feedback - Webpack (gzipped)	17.14 KB (0%)