Add ST8C, DEGOV1 and TGSimple models. Also, remove Windows PR Testing temporarily

[rodrigomha]

Tests are passing locally with PSY main, but we need a new release of PSY for this test to pass.

[github-actions]

Performance Results

Version	Precompile Time
Main	1.946192366
This Branch	1.966989072

Version	Execute Time
Main-Build ResidualModel	7.729201866
Main-Execute ResidualModel	16.544526572
Main-Build MassMatrixModel	0.619487329
Main-Execute MassMatrixModel	32.666862513
This Branch-Build ResidualModel	7.173901082
This Branch-Execute ResidualModel	16.917629562
This Branch-Build MassMatrixModel	0.619157398
This Branch-Execute MassMatrixModel	32.462768306

ResidualModel and MassMatrixModel performance results should be compared between versions and not between models due to the execution order of the tests

[codecov]

Codecov Report

Attention: Patch coverage is 95.36424% with 7 lines in your changes missing coverage. Please review.

Project coverage is 87.14%. Comparing base (c94d006) to head (2db5322).
Report is 9 commits behind head on main.

Files with missing lines	Patch %	Lines
...rc/initialization/generator_components/init_avr.jl	93.33%	5 Missing ⚠️
src/models/generator_models/avr_models.jl	96.61%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #390      +/-   ##
==========================================
- Coverage   87.36%   87.14%   -0.23%     
==========================================
  Files          65       66       +1     
  Lines        9143     9853     +710     
==========================================
+ Hits         7988     8586     +598     
- Misses       1155     1267     +112     

Flag	Coverage Δ
unittests	87.14% <95.36%> (-0.23%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
src/post_processing/post_proc_generator.jl	90.89% <100.00%> (+1.74%)	⬆️
src/models/generator_models/avr_models.jl	98.85% <96.61%> (-0.24%)	⬇️
...rc/initialization/generator_components/init_avr.jl	94.65% <93.33%> (-0.83%)	⬇️

... and 4 files with indirect coverage changes

[SebastianManriqueM]

Looks Good