Mark direct usage of Logs API as Development

[pellared]

Address https://github.com/open-telemetry/opentelemetry-specification/pull/4382/files#r1925732045

This is a PR that should be approved/reviewed if anyone has a strong opinion that allowing direct use of Logs API should be in Development status instead of Stable.

Notice that a spec release is already out (#4352) and we could just say that "ship has sailed". On the other side, we can consider this PR as a bugfix.

Side note: If you ask me, I would rather keep it as Stable 😉

[carlosalberto]

My two cents: I'd rather stick to it being Stable, as the very Logs API was already stable. Although this note may need to be updated, to clearly expose our intention now (being intended as logging backend and (new) for direct user facing, etc):

Note: this document defines a log backend API. The API is not intended
to be called by application developers directly. It is provided for logging
library authors to build
log appenders,
which use this API to bridge between existing logging libraries and the
OpenTelemetry log data model.

[github-actions]

This PR was marked stale due to lack of activity. It will be closed in 7 days.