Fix pyomo --version version string

[jsiirola]

Fixes # .

Summary/Motivation:

#2741 requests that developers set the version= parameter to the development version returned by pyomo --version. This PR fixes pyomo --version so that the full __version__ is printed out (including the .dev0).

This also cleans up some of the logic around the version system, adding a little documentation, and removing support for development in Subversion (which we haven't supported in more than 4 years).

Changes proposed in this PR:

• include the development serial number in pyomo --version
• clean up logic in pyomo/version/info.py

Legal Acknowledgement

By contributing to this software project, I have read the contribution guide and agree to the following terms and conditions for my contribution:

1. I agree my contributions are submitted under the BSD license.
2. I represent I am authorized to make the contributions and grant the license. If my employer has rights to intellectual property that includes these contributions, I represent that I have received permission to make contributions and grant the required license on behalf of that employer.

[codecov]

Codecov Report

Base: 86.80% // Head: 86.73% // Decreases project coverage by -0.07% ⚠️

Coverage data is based on head (7defe56) compared to base (0f59de9).
Patch coverage: 80.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2743      +/-   ##
==========================================
- Coverage   86.80%   86.73%   -0.07%     
==========================================
  Files         774      774              
  Lines       86980    86984       +4     
==========================================
- Hits        75499    75444      -55     
- Misses      11481    11540      +59     

Flag	Coverage Δ
linux	83.80% <80.00%> (-0.01%)	⬇️
osx	73.27% <80.00%> (+<0.01%)	⬆️
other	83.98% <80.00%> (-0.01%)	⬇️
win	81.20% <80.00%> (-0.01%)	⬇️

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

Impacted Files	Coverage Δ
pyomo/version/info.py	78.12% <80.00%> (-0.45%)	⬇️
pyomo/util/subsystems.py	89.13% <0.00%> (-8.70%)	⬇️
...ontrib/appsi/utils/collect_vars_and_named_exprs.py	93.75% <0.00%> (-6.25%)	⬇️
pyomo/core/base/external.py	95.43% <0.00%> (-3.16%)	⬇️
pyomo/contrib/appsi/writers/nl_writer.py	84.39% <0.00%> (-2.32%)	⬇️
pyomo/repn/plugins/ampl/ampl_.py	81.40% <0.00%> (-1.86%)	⬇️
pyomo/core/expr/compare.py	96.52% <0.00%> (-1.74%)	⬇️
pyomo/contrib/mindtpy/algorithm_base_class.py	80.79% <0.00%> (-0.34%)	⬇️
pyomo/contrib/appsi/solvers/ipopt.py	88.51% <0.00%> (-0.34%)	⬇️
pyomo/repn/plugins/nl_writer.py	93.62% <0.00%> (-0.32%)	⬇️
... and 2 more

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