compiler: Skip CondEq snapshot shift when the point is on the factor grid

[mloubout]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 94.44444% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 84.26%. Comparing base (00865f8) to head (a9964bb).

Files with missing lines	Patch %	Lines
devito/types/relational.py	84.61%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3043      +/-   ##
==========================================
+ Coverage   84.25%   84.26%   +0.01%     
==========================================
  Files         258      258              
  Lines       56955    56982      +27     
  Branches     4851     4854       +3     
==========================================
+ Hits        47989    48018      +29     
+ Misses       8139     8138       -1     
+ Partials      827      826       -1     

Flag	Coverage Δ
pytest-gpu-aomp-amdgpuX	68.56% <50.00%> (-0.02%)	⬇️
pytest-gpu-gcc-	79.03% <94.44%> (+<0.01%)	⬆️
pytest-gpu-icx-	78.99% <94.44%> (+0.03%)	⬆️
pytest-gpu-nvc-nvidiaX	69.14% <50.00%> (-0.01%)	⬇️

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[EdCaunt]

Adding an example to this docstring would be useful. I figured it out, but it wasn't super obvious