compiler: Enhance detect_accesses and patch symbolic padding

[FabioLuporini]

Test in PRO in the PR/branch with same name as this one

[codecov]

Codecov Report

❌ Patch coverage is 91.57895% with 8 lines in your changes missing coverage. Please review.
✅ Project coverage is 82.87%. Comparing base (bd39274) to head (63b23b5).

Files with missing lines	Patch %	Lines
devito/types/parallel.py	66.66%	7 Missing ⚠️
devito/symbolics/extended_sympy.py	95.65%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2886      +/-   ##
==========================================
- Coverage   83.43%   82.87%   -0.57%     
==========================================
  Files         248      248              
  Lines       51381    51470      +89     
  Branches     4431     4433       +2     
==========================================
- Hits        42871    42656     -215     
- Misses       7757     8049     +292     
- Partials      753      765      +12     

Flag	Coverage Δ
pytest-gpu-aomp-amdgpuX	?
pytest-gpu-gcc-	77.85% <91.57%> (-0.20%)	⬇️
pytest-gpu-icx-	43.11% <42.10%> (-34.56%)	⬇️
pytest-gpu-nvc-nvidiaX	69.32% <69.35%> (-0.01%)	⬇️

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[mloubout]

This look very specific and seems like that's something retrieve_index should catch

[FabioLuporini]

the idea is that other objects can end up there, in the future, maybe...

as for retrieve_indexed catching it: disagree, it's not an implicit Indexed, it's rarther a logical representation of the base address of the TensorMove -- as an Indexed, for homogeneity