feat(serverless): Add Node.js 20 to compatible runtimes

[lforst]

Fixes #9879

https://aws.amazon.com/about-aws/whats-new/2023/11/aws-lambda-support-node-js-20/

[github-actions]

size-limit report 📦

Path	Size
@sentry/browser (incl. Tracing, Replay, Feedback)	82.19 KB (added)
@sentry/browser (incl. Tracing, Replay)	73.52 KB (added)
@sentry/browser (incl. Tracing, Replay with Canvas)	77.33 KB (added)
@sentry/browser (incl. Tracing, Replay) - with treeshaking flags	67.07 KB (added)
@sentry/browser (incl. Tracing)	38.15 KB (added)
@sentry/browser (incl. browserTracingIntegration)	38.15 KB (added)
@sentry/browser (incl. feedbackIntegration)	33.01 KB (added)
@sentry/browser (incl. feedbackModalIntegration)	33.09 KB (added)
@sentry/browser (incl. feedbackScreenshotIntegration)	33.1 KB (added)
@sentry/browser (incl. sendFeedback)	29.08 KB (added)
@sentry/browser	24.25 KB (added)
CDN Bundle (incl. Tracing, Replay, Feedback)	76.57 KB (added)
CDN Bundle (incl. Tracing, Replay)	71.43 KB (added)
CDN Bundle (incl. Tracing)	37.77 KB (added)
CDN Bundle	25.62 KB (added)
CDN Bundle (incl. Tracing, Replay) - uncompressed	223.88 KB (added)
CDN Bundle (incl. Tracing) - uncompressed	113.82 KB (added)
CDN Bundle - uncompressed	75.66 KB (added)
@sentry/react (incl. Tracing, Replay)	73.51 KB (added)
@sentry/react	24.27 KB (added)