test(replay): Ensure that unicode characters are handled correctly

[Lms24]

While working on #7082 we figured it'd be worthwhile to check that we handle unicode characters correctly. Especially when compressing payload we should check that nothing goes wrong.

Note: This test obviously only checks that the payloads leave the SDK correctly. It cannot say anything about the replayer rendering them correctly in the Sentry UI.

ref #7044

[mydea]

This is nice, might be worthwhile to also include this in the E2E test: #7249 - I'll leave a note there!

[github-actions]

size-limit report 📦

Path	Size
@sentry/browser - ES5 CDN Bundle (gzipped + minified)	20.07 KB (+0.01% 🔺)
@sentry/browser - ES5 CDN Bundle (minified)	62.3 KB (0%)
@sentry/browser - ES6 CDN Bundle (gzipped + minified)	18.69 KB (+0.02% 🔺)
@sentry/browser - ES6 CDN Bundle (minified)	55.31 KB (0%)
@sentry/browser - Webpack (gzipped + minified)	20.41 KB (0%)
@sentry/browser - Webpack (minified)	66.76 KB (0%)
@sentry/react - Webpack (gzipped + minified)	20.44 KB (0%)
@sentry/nextjs Client - Webpack (gzipped + minified)	47.86 KB (0%)
@sentry/browser + @sentry/tracing - ES5 CDN Bundle (gzipped + minified)	26.94 KB (0%)
@sentry/browser + @sentry/tracing - ES6 CDN Bundle (gzipped + minified)	25.2 KB (0%)
@sentry/replay ES6 CDN Bundle (gzipped + minified)	42.61 KB (+0.11% 🔺)
@sentry/replay - Webpack (gzipped + minified)	36.82 KB (+0.12% 🔺)
@sentry/browser + @sentry/tracing + @sentry/replay - ES6 CDN Bundle (gzipped + minified)	60.24 KB (+0.07% 🔺)
@sentry/browser + @sentry/replay - ES6 CDN Bundle (gzipped + minified)	53.84 KB (+0.08% 🔺)