KKT Transform

[ChrisLaliwala]

Fixes # .

Summary/Motivation:

This PR creates a Pyomo transformation for reformulating models using the KKT conditions.

Changes proposed in this PR:

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1. I agree my contributions are submitted under the BSD license.
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[ChrisLaliwala]

Need to add a couple of more test before PR is ready to be reviewed. Will be done in 1-2 days.

[codecov]

Codecov Report

❌ Patch coverage is 97.20670% with 5 lines in your changes missing coverage. Please review.
✅ Project coverage is 86.51%. Comparing base (bdb22dd) to head (fce4632).

Files with missing lines	Patch %	Lines
pyomo/core/plugins/transform/kkt.py	97.20%	5 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3860      +/-   ##
==========================================
- Coverage   89.67%   86.51%   -3.17%     
==========================================
  Files         908      909       +1     
  Lines      106735   106914     +179     
==========================================
- Hits        95717    92495    -3222     
- Misses      11018    14419    +3401     

Flag	Coverage Δ
builders	29.06% <13.40%> (-0.02%)	⬇️
default	85.98% <97.20%> (?)
expensive	35.47% <13.40%> (?)
linux	?
linux_other	?
oldsolvers	27.97% <13.40%> (-0.03%)	⬇️
osx	?
win	?
win_other	?

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