Update obs4mips dataset versions (ESGF) in clouds recipes

[rbeucher]

Description

Following discussion here #2974

CERES-EBAF Ed2-7 is not available on ESGF anymore.
CERES-EBAF Ed2-8 is available for variable rlut, rlutcs, rsdt, rsut, rsutcs.
This PR removes the version facet for CERES-EBAF which fix automatic download from ESGF.

GPCP-SG v2.2 ['pr'] is GPCP-V2.2 on ESGF.
MODIS C5 ['clt'] is MODIS-1-0 on ESGF

Note that when trying to download MODIS-1-0, ESMValTool adds the time_frequency facet to the ESGF query while MODIS-1-0 uses frequency.
The query does not return the data successfully. We have noticed that issue for a few other datasets, see #3317 discussion.
I have updated the version to align with ESGF anyway

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