Restore pp_trop_mam_oslo

[gold2718]

What is the feature/what would you like to discuss?

As part of building the new CAM-Nor version, pp_trop_mam_oslo needs to be restored or re-implemented from the noresm2 version.

Given that the chemistry pre-processor has changed, it will probably be necessary to regenerate the source code using the new pre-processor version. This will be done unless a test shows no source-code change.

There is not a lot of history of pp_trop_mam_oslo in this repository, however, the relevant comments in the log record will be copied into the log for this work.

Is there anyone in particular you want to be part of this conversation?

No response

Will this change (regression test) answers?

Yes

Will you be implementing this enhancement yourself?

Yes