ref(utils): Deprecate walk method

[mydea]

This was supposed to be removed in v7, but was forgotten.

[github-actions]

size-limit report 📦

Path	Size
@sentry/browser (incl. Tracing, Replay) - Webpack (gzipped)	84.24 KB (-0.03% 🔽)
@sentry/browser (incl. Tracing) - Webpack (gzipped)	31.41 KB (-0.02% 🔽)
@sentry/browser - Webpack (gzipped)	22 KB (0%)
@sentry/browser (incl. Tracing, Replay) - ES6 CDN Bundle (gzipped)	78.69 KB (0%)
@sentry/browser (incl. Tracing) - ES6 CDN Bundle (gzipped)	28.52 KB (-0.01% 🔽)
@sentry/browser - ES6 CDN Bundle (gzipped)	20.59 KB (0%)
@sentry/browser (incl. Tracing, Replay) - ES6 CDN Bundle (minified & uncompressed)	254.14 KB (0%)
@sentry/browser (incl. Tracing) - ES6 CDN Bundle (minified & uncompressed)	86.42 KB (0%)
@sentry/browser - ES6 CDN Bundle (minified & uncompressed)	61.23 KB (0%)
@sentry/browser (incl. Tracing) - ES5 CDN Bundle (gzipped)	31.38 KB (-0.02% 🔽)
@sentry/react (incl. Tracing, Replay) - Webpack (gzipped)	84.26 KB (-0.02% 🔽)
@sentry/react - Webpack (gzipped)	22.03 KB (0%)
@sentry/nextjs Client (incl. Tracing, Replay) - Webpack (gzipped)	102.23 KB (+0.03% 🔺)
@sentry/nextjs Client - Webpack (gzipped)	50.98 KB (+0.06% 🔺)