suppress psy-reg plugin for now (before psy-reg==1.5.0 is released)

[valeriupredoi]

Description

• Closes Documentation build is failing #3638
• Link to documentation: tis ere

psyplot=1.5.0 and psy-reg=1.4.0 are incompatible:

(esmvaltool) valeriu@valeriu-PORTEGE-Z30-C:~/ESMValTool$ conda list psy
# packages in environment at /home/valeriu/miniconda3/envs/esmvaltool:
#
# Name                    Version                   Build  Channel
psy-maps                  1.5.0           py311h38be061_1    conda-forge
psy-reg                   1.4.0           py311h38be061_3    conda-forge
psy-simple                1.5.0           py311h38be061_1    conda-forge
psyplot                   1.5.0           py311h38be061_1    conda-forge
(esmvaltool) valeriu@valeriu-PORTEGE-Z30-C:~/ESMValTool$ python esmvaltool/diag_scripts/psyplot_diag.py
WARNING:psyplot.config.rcsetup:Failed to import EntryPoint(name='plugin', value='psy_reg.plugin', group='psyplot')!
WARNING:psyplot:Could not import EntryPoint(name='plugin', value='psy_reg.plugin', group='psyplot')
Traceback (most recent call last):
  File "/home/valeriu/miniconda3/envs/esmvaltool/lib/python3.11/site-packages/psyplot/__init__.py", line 132, in get_versions
    mod = ep.load()
          ^^^^^^^^^
  File "/home/valeriu/miniconda3/envs/esmvaltool/lib/python3.11/site-packages/importlib_metadata/__init__.py", line 184, in load
    module = import_module(match.group('module'))
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/valeriu/miniconda3/envs/esmvaltool/lib/python3.11/importlib/__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "<frozen importlib._bootstrap>", line 1204, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1176, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1147, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 690, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 940, in exec_module
  File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed
  File "/home/valeriu/miniconda3/envs/esmvaltool/lib/python3.11/site-packages/psy_reg/plugin.py", line 36, in <module>
    from psyplot.compat.pycompat import map, filter
ModuleNotFoundError: No module named 'psyplot.compat'
usage: psyplot_diag.py [-h] [-f] [-i] [-n] [-l {debug,info,warning,error}] filename
psyplot_diag.py: error: the following arguments are required: filename

---

Before you get started

• ☝ Create an issue to discuss what you are going to do

Checklist

It is the responsibility of the author to make sure the pull request is ready to review. The icons indicate whether the item will be subject to the 🛠 Technical or 🧪 Scientific review.

• 🛠 This pull request has a descriptive title
• 🛠 Code is written according to the code quality guidelines
• 🛠 All checks below this pull request were successful

[valeriupredoi]

@bouweandela @schlunma do we want to plop this in? Docs builds go through, even if this is flagged as a warning, but the actual diag doesn't work; having said that, psy-reg 1.5.0 will be up soon, so that'll fix this without us doing anything - I am inclined to close this PR, unless yous say something else

[schlunma]

If the diagnostic doesn't work, I agree that closing this is the best option 👍

[valeriupredoi]

Well, it works with this kluge, but not without it, and not before psy-reg 1.5.0

[schlunma]

But we won't need this with psy-reg 1.5.0 which will be out soon? If that's the case, I vote for closing this

[valeriupredoi]

indeed, we have thumbs up from Philipp on psy-reg, see #3501 (comment)