Deprecate old Cubic EoS

[dallan-keylogic]

Summary/Motivation:

The old cubic equation of state has not been updated to have correct formulae for partial molar Gibbs and Helmholtz free energy, and doesn't have any formulae for heat capacity or speed of sound. Since it's been made obsolete by the cubic EoS implemented through the Modular Property Framework, there's no reason to keep it around to confuse people.

Changes proposed in this PR:

• Deprecate old Cubic EoS property block, parameter block, and initializer.
• Deprecate BT Peng-Robinson class based on old Cubic EoS

Legal Acknowledgement

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[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 76.99%. Comparing base (2e5a9a4) to head (eb41ff6).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1519      +/-   ##
==========================================
- Coverage   76.99%   76.99%   -0.01%     
==========================================
  Files         384      384              
  Lines       62076    62079       +3     
  Branches    10158    10158              
==========================================
  Hits        47798    47798              
- Misses      11861    11865       +4     
+ Partials     2417     2416       -1     

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