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."