feat(astro): Add assets option to source maps upload options

[Lms24]

This PR adds the assets option to the Astro integration source maps upload options.

It behaves just like the assets option of the Vite plugin, taking a (array of) glob(s) and overriding the
default values.
This came up in #9591 and I think it makes sense to give users with more advanced/custom setups the ability to
override our defaults.

Docs PR: getsentry/sentry-docs#8586

[lforst]

No direct exporting of API 👌😄

[Lms24]

No direct exporting of API 👌😄

Never again ;)

[github-actions]

size-limit report 📦

Path	Size
@sentry/browser (incl. Tracing, Replay) - Webpack (gzipped)	65.86 KB (0%)
@sentry/browser (incl. Tracing, Replay) - Webpack with treeshaking flags (gzipped)	59.46 KB (0%)
@sentry/browser (incl. Tracing) - Webpack (gzipped)	31.11 KB (0%)
@sentry/browser - Webpack (gzipped)	21.38 KB (0%)
@sentry/browser (incl. Tracing, Replay) - ES6 CDN Bundle (gzipped)	62.71 KB (0%)
@sentry/browser (incl. Tracing) - ES6 CDN Bundle (gzipped)	29.52 KB (0%)
@sentry/browser - ES6 CDN Bundle (gzipped)	21.6 KB (0%)
@sentry/browser (incl. Tracing, Replay) - ES6 CDN Bundle (minified & uncompressed)	197.46 KB (0%)
@sentry/browser (incl. Tracing) - ES6 CDN Bundle (minified & uncompressed)	89.32 KB (0%)
@sentry/browser - ES6 CDN Bundle (minified & uncompressed)	64.29 KB (0%)
@sentry/browser (incl. Tracing) - ES5 CDN Bundle (gzipped)	32.21 KB (0%)
@sentry/react (incl. Tracing, Replay) - Webpack (gzipped)	66.24 KB (0%)
@sentry/react - Webpack (gzipped)	21.42 KB (0%)
@sentry/nextjs Client (incl. Tracing, Replay) - Webpack (gzipped)	82.96 KB (0%)
@sentry/nextjs Client - Webpack (gzipped)	48.21 KB (0%)
@sentry-internal/feedback - Webpack (gzipped)	16.19 KB (0%)