Simplify static test scenarios

[gdalle]

DIT source

• Make num_to_arr non-allocating up to the conversion into the proper array type

DIT extensions

• Remove MArray versions from static scenarios

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.54%. Comparing base (9174ccb) to head (a013a94).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #581      +/-   ##
==========================================
- Coverage   97.57%   97.54%   -0.03%     
==========================================
  Files         110      110              
  Lines        5227     5222       -5     
==========================================
- Hits         5100     5094       -6     
- Misses        127      128       +1     

Flag	Coverage Δ
DI	98.59% <ø> (ø)
DIT	95.57% <100.00%> (-0.07%)	⬇️

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