Gams gurobi valid solvers fix

[sergey-gusev94]

Fixes # None

Summary/Motivation:

Previously, the configuration did not account for the use of NLP and MINLP when Gurobi was selected as a subsolver within GAMS. This PR ensures that these problem types are properly recognized and supported.

Changes proposed in this PR:

• Added support for NLP and MINLP when Gurobi is used as a subsolver within GAMS.

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[jsiirola]

This is great - and needed. Please:

• reorder the set entries to match the column order from https://www.gams.com/latest/docs/S_MAIN.html#SOLVERS_MODEL_TYPES
• verify the set matches those docs (I believe that RNLP is missing)
• [bonus] would you mind going through that table and verifying the other solvers, too (and add any missing entries)?

[sergey-gusev94]

I have reordered the set entries and added missing solvers.

[jsiirola]

We should probably:

• add a test that verifies that this data structure is correct
• only create this data structure the first time it is needed (maybe move this to a class attribute?)

But, I am fine deferring these for a subsequent PR.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.32%. Comparing base (918824e) to head (d4f8a69).
⚠️ Report is 6 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3714      +/-   ##
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+ Coverage   89.31%   89.32%   +0.01%     
==========================================
  Files         896      896              
  Lines      103687   103687              
==========================================
+ Hits        92609    92621      +12     
+ Misses      11078    11066      -12     

Flag	Coverage Δ
builders	29.10% <ø> (+<0.01%)	⬆️
default	85.93% <ø> (?)
expensive	35.86% <ø> (?)
linux	86.96% <ø> (-2.09%)	⬇️
linux_other	86.96% <ø> (ø)
osx	83.10% <ø> (ø)
win	85.23% <ø> (+0.01%)	⬆️
win_other	85.23% <ø> (+0.01%)	⬆️

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