Support Sentry Logging in the JS Loader and CDN

[AbhiPrasad]

Description

You can now send structured logs to Sentry! See the docs here.

We don't have logging functionality exposed in the loader or a separate CDN bundle. We should add it.

[Lms24]

We probably also need a shim then for non-logging bundles in case users enable logging first, add manual logger calls and then disable logging via the UI later. (i.e. similar to what we do with BrowserTracing and Replay)