[Rewriter(matmul_add_to_gemm)]: check shapes

[AyoubMDL]

As we need to check the rank of input shapes, we need to ensure that input shapes are not None before checking their rank. Used _ir_utils.has_rank to handle that.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 70.01%. Comparing base (1a7f3bd) to head (6ecd7ab).
⚠️ Report is 3 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2528   +/-   ##
=======================================
  Coverage   70.01%   70.01%           
=======================================
  Files         215      215           
  Lines       25988    25989    +1     
  Branches     2606     2606           
=======================================
+ Hits        18195    18196    +1     
  Misses       6895     6895           
  Partials      898      898           

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