Fix coords in ESACCI-CLOUD cmorizer

[LisaBock]

Description

This PR fixes the ESACCI-Cloud cmorizer by removing the auxiliary coords "month_number" and "year".

• Closes #issue_number
• Link to documentation:

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[schlunma]

I wonder if it would make sense to remove these coordinates in the corresponding ESMValCore function.

It looks like for some (e.g., daily_statistics) this is already done, so it would probably make sense to do that for the others as well.

The only problem with this is that it may break existing diagnostics/CMORizers (wouldn't be to hard to check though, I guess). @ESMValGroup/technical-lead-development-team opinions?

[axel-lauer]

Thanks @LisaBock, looks good! I recreated the monthly mean files and moved the new files to our OBS pool on Levante.