Log warning if if source-map generation would change with v9

[lforst]

Description

As pre-work to #13993, we should go in and log warnings if source map generation behaviour will change when we implement this issue in v9.

Potential log messages:

• "You disabled sourcemaps in your ... app with the ... option. Currently, the Sentry SDK will override this option to generate sourcemaps. In future versions, the Sentry SDK will not override the ... option if you explicitly disable it. If you want to generate and upload sourcemaps please set the ... option to true or undefined."
• "The Sentry SDK has enabled source map generation. If you do not want to serve Source Maps to your users either set the deleteSourceMapsAfterUpload option to true, or manually delete the source maps after the build. In future Sentry SDK versions deleteSourceMapsAfterUpload will default to true."

SDKs

Beta Give feedback

1. NextJS
2. Remix (N/A because sm uplaod happens via vite plugin and manual enabling of source maps)
3. Astro
4. SvelteKit
5. Gatsby (N/A because we don't enable sourcemapping for the user)
6. Nuxt
7. SolidStart

[github-actions]

A PR closing this issue has just been released 🚀

This issue was referenced by PR #14533, which was included in the 8.42.0 release.