Revert squashed "meta: Update CHANGELOG for 7.45.0 (#7588)"

[Lms24]

Because I accidentally squashed and merged #7588 this PR now reverts that commit.

[github-actions]

size-limit report 📦

Path	Size
@sentry/browser - ES5 CDN Bundle (gzipped + minified)	20.5 KB (-0.35% 🔽)
@sentry/browser - ES5 CDN Bundle (minified)	63.83 KB (-0.58% 🔽)
@sentry/browser - ES6 CDN Bundle (gzipped + minified)	19.19 KB (+0.3% 🔺)
@sentry/browser - ES6 CDN Bundle (minified)	56.92 KB (+0.62% 🔺)
@sentry/browser - Webpack (gzipped + minified)	21.66 KB (+0.34% 🔺)
@sentry/browser - Webpack (minified)	72.12 KB (+0.65% 🔺)
@sentry/react - Webpack (gzipped + minified)	21.7 KB (+0.39% 🔺)
@sentry/nextjs Client - Webpack (gzipped + minified)	52.05 KB (+0.35% 🔺)
@sentry/browser + @sentry/tracing - ES5 CDN Bundle (gzipped + minified)	27.81 KB (-0.44% 🔽)
@sentry/browser + @sentry/tracing - ES6 CDN Bundle (gzipped + minified)	26.13 KB (+0.09% 🔺)
@sentry/replay ES6 CDN Bundle (gzipped + minified)	44.23 KB (-0.23% 🔽)
@sentry/replay - Webpack (gzipped + minified)	38.28 KB (-0.3% 🔽)
@sentry/browser + @sentry/tracing + @sentry/replay - ES6 CDN Bundle (gzipped + minified)	62.44 KB (-0.16% 🔽)
@sentry/browser + @sentry/replay - ES6 CDN Bundle (gzipped + minified)	55.99 KB (-0.14% 🔽)