[ENH] relax requirements for test_sampling_affine

[Remi-Gau]

• Closes Failure of test_surface.py::test_sampling_affine using pre-release dependencies #4328

Changes proposed in this pull request:

• uses assert_array_almost_equal with decimal=15 instead of assert_array_equal

[github-actions]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.15%. Comparing base (abb80ff) to head (fbbd1c0).
Report is 40 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4349      +/-   ##
==========================================
+ Coverage   91.85%   92.15%   +0.29%     
==========================================
  Files         144      143       -1     
  Lines       16419    16496      +77     
  Branches     3434     3463      +29     
==========================================
+ Hits        15082    15202     +120     
+ Misses        792      749      -43     
  Partials      545      545              

Flag	Coverage Δ
macos-latest_3.10_test_plotting	91.94% <ø> (?)
macos-latest_3.11_test_plotting	91.94% <ø> (+0.09%)	⬆️
macos-latest_3.12_test_plotting	91.94% <ø> (?)
macos-latest_3.8_test_plotting	91.91% <ø> (?)
macos-latest_3.9_test_plotting	91.91% <ø> (?)
ubuntu-latest_3.10_test_plotting	91.94% <ø> (+0.09%)	⬆️
ubuntu-latest_3.11_test_plotting	91.94% <ø> (?)
ubuntu-latest_3.12_test_plotting	91.94% <ø> (?)
ubuntu-latest_3.12_test_pre	91.94% <ø> (?)
ubuntu-latest_3.8_test_min	68.83% <ø> (?)
ubuntu-latest_3.8_test_plot_min	91.61% <ø> (?)
ubuntu-latest_3.8_test_plotting	91.91% <ø> (?)
ubuntu-latest_3.9_test_plotting	91.91% <ø> (?)
windows-latest_3.10_test_plotting	91.92% <ø> (?)
windows-latest_3.11_test_plotting	91.92% <ø> (?)
windows-latest_3.12_test_plotting	91.92% <ø> (?)
windows-latest_3.8_test_plotting	91.88% <ø> (?)
windows-latest_3.9_test_plotting	91.89% <ø> (?)

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[bthirion]

LGTM, thx.