@sentry/webpack-plugin: `silent: true` should not hide warnings and errors

[tomasz-sodzawiczny]

Environment

@sentry/nextjs 8.33.1

Steps to Reproduce

1. the project had silent: true passed into the withSentryConfig() (@sentry/webpack-plugin options)
2. the SENTRY_AUTH_TOKEN got deleted from the CD pipeline setup

Expected Result

It's great to hide most of the logs, but I would expect warnings / errors, like the one below, to still be shown:

[@sentry/nextjs - Node.js] Warning: No auth token provided. Will not create release. [...]

Actual Result

No errors.