feat: allow mutation rate limiter configuration

[pauldambra]

see https://posthoghelp.zendesk.com/agent/tickets/20033

We've rewritten ingestion completely since adding SVG throttling and a customer isn't having a great playback experience because of it.

Let's introduce some configurability... it should be that setting

 {
 	session_recording: {
		__mutationRateLimiterRefillRate: 20 // for moderate decrease in throttling
       // or e.g. __mutationRateLimiterRefillRate: 75 // for significant decrease in throttling

this used to have a significant impact on ingestion, but if the customer in the linked ticket is willing to test then we monitor what changes are safe here and maybe even change the defaults

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Name	Status	Preview	Updated (UTC)
posthog-js	✅ Ready (Inspect)	Visit Preview	Oct 31, 2024 10:53am

[github-actions]

Size Change: +2.52 kB (+0.09%)

Total Size: 2.95 MB

Filename	Size	Change
dist/array.full.es5.js	249 kB	+256 B (+0.1%)
dist/array.full.js	336 kB	+252 B (+0.08%)
dist/array.full.no-external.js	335 kB	+252 B (+0.08%)
dist/array.js	167 kB	+252 B (+0.15%)
dist/array.no-external.js	166 kB	+252 B (+0.15%)
dist/main.js	167 kB	+252 B (+0.15%)
dist/module.full.js	336 kB	+252 B (+0.08%)
dist/module.full.no-external.js	335 kB	+252 B (+0.08%)
dist/module.js	167 kB	+252 B (+0.15%)
dist/module.no-external.js	166 kB	+252 B (+0.15%)

ℹ️ View Unchanged

Filename	Size
dist/all-external-dependencies.js	182 kB
dist/exception-autocapture.js	8.77 kB
dist/external-scripts-loader.js	2.19 kB
dist/recorder-v2.js	102 kB
dist/recorder.js	103 kB
dist/surveys-preview.js	56.7 kB
dist/surveys.js	62.1 kB
dist/tracing-headers.js	1.33 kB
dist/web-vitals.js	10.3 kB

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