[MAINT] Update handling of matplotlib ax overwrite deprecation

[ymzayek]

• Closes none

Resets handling of matplotlib deprecation. With the newest matplotlib v3.7.3 release, this change is causing the CI failures. I have to see if I handled it incorrectly or if it's a new bug on their side. For the time being, will merge this PR so the CI passes

Edit: see comment below

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[codecov]

Codecov Report

Merging #3965 (b8d8828) into main (d2779b9) will decrease coverage by 0.01%.
Report is 1 commits behind head on main.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##             main    #3965      +/-   ##
==========================================
- Coverage   91.78%   91.78%   -0.01%     
==========================================
  Files         134      134              
  Lines       15772    15772              
  Branches     3284     3284              
==========================================
- Hits        14477    14476       -1     
- Misses        751      752       +1     
  Partials      544      544              

Flag	Coverage Δ
ubuntu-latest_3.10	91.70% <0.00%> (?)
ubuntu-latest_3.8	91.67% <0.00%> (?)
ubuntu-latest_3.9	91.67% <0.00%> (?)
windows-latest_3.10	91.64% <0.00%> (?)
windows-latest_3.11	91.64% <0.00%> (?)
windows-latest_3.9	91.61% <0.00%> (?)

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Files Changed	Coverage Δ
nilearn/plotting/img_plotting.py	89.13% <0.00%> (-0.21%)	⬇️

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[ymzayek]

Ok maybe it was fine the way it was but I didn't use good arguments for _compare_version