transforms: (exp) lower exp to polynomial dialect

[szerdick]

No description provided.

[szerdick]

this builds on top of #5951

[codecov]

Codecov Report

❌ Patch coverage is 93.12977% with 9 lines in your changes missing coverage. Please review.
✅ Project coverage is 86.75%. Comparing base (88cc66f) to head (5e7d8c4).
⚠️ Report is 14 commits behind head on main.

Files with missing lines	Patch %	Lines
xdsl/transforms/polynomial_eval_to_arith.py	92.06%	3 Missing and 2 partials ⚠️
xdsl/transforms/lower_exp_to_polynomial.py	93.54%	2 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6044      +/-   ##
==========================================
+ Coverage   86.73%   86.75%   +0.02%     
==========================================
  Files         425      427       +2     
  Lines       63539    63734     +195     
  Branches     7289     7301      +12     
==========================================
+ Hits        55108    55295     +187     
- Misses       6865     6868       +3     
- Partials     1566     1571       +5     

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