Support Numpy 1.25

[hoxbro]

With numpy 1.25 this would error previously:

❯ python -c "import holoviews as hv; hv.dim('float').var(ddof=0)"
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/home/shh/Repos/holoviz/holoviews/holoviews/util/transform.py", line 490, in var
    def var(self, *args, **kwargs):      return type(self)(self, np.var, *args, **kwargs)
                                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/shh/Repos/holoviz/holoviews/holoviews/util/transform.py", line 278, in __init__
    any(fn in funcs for funcs in self._all_funcs)):
                                 ^^^^^^^^^^^^^^^
  File "/home/shh/Repos/holoviz/holoviews/holoviews/util/transform.py", line 315, in __getattribute__
    ops = super().__getattribute__('ops')
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: 'dim' object has no attribute 'ops'

I also added a CI run that only runs test-core always to be able to test the latest numpy and pandas.

[codecov-commenter]

Codecov Report

Merging #5870 (25878cc) into main (0f6ed70) will decrease coverage by 0.13%.
The diff coverage is 62.96%.

@@            Coverage Diff             @@
##             main    #5870      +/-   ##
==========================================
- Coverage   88.34%   88.22%   -0.13%     
==========================================
  Files         310      310              
  Lines       63960    63981      +21     
==========================================
- Hits        56508    56445      -63     
- Misses       7452     7536      +84     

Flag	Coverage Δ
ui-tests	?

Flags with carried forward coverage won't be shown. Click here to find out more.

Files Changed	Coverage Δ
holoviews/__init__.py	70.96% <0.00%> (ø)
holoviews/tests/util/test_utils.py	96.34% <57.14%> (-3.66%)	⬇️
holoviews/tests/core/data/test_imageinterface.py	99.42% <60.00%> (-0.58%)	⬇️
holoviews/tests/util/test_transform.py	95.75% <60.00%> (-1.21%)	⬇️
holoviews/tests/element/test_selection.py	98.11% <100.00%> (ø)
holoviews/util/transform.py	86.18% <100.00%> (-0.03%)	⬇️

... and 4 files with indirect coverage changes

📣 We’re building smart automated test selection to slash your CI/CD build times. Learn more

[github-actions]

This pull request has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.