dialects: (memref_stream) add interleaved iterator

[superlopuh]

The way this is modeled is with a region already interleaved. This should simplify the lowering to loops, as the region won't need to be modified, and we can

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.83%. Comparing base (01640fc) to head (f3eefe5).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2813      +/-   ##
==========================================
+ Coverage   89.82%   89.83%   +0.01%     
==========================================
  Files         396      396              
  Lines       49055    49096      +41     
  Branches     7510     7519       +9     
==========================================
+ Hits        44063    44106      +43     
+ Misses       3803     3802       -1     
+ Partials     1189     1188       -1     

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