REFACTOR: move add calculation to CommonOptimetrics

[gmalinve]

Description

Move add_calculation to CommonOptimetrics and remove _add_goal because it's not use anywhere.
add_goal method uses _add_calculation (in CommonOptimetrics). _add_goal was redundant.

Issue linked

Please mention the issue number or describe the problem this pull request addresses.

Checklist

• I have tested my changes locally.
• I have added necessary documentation or updated existing documentation.
• I have followed the coding style guidelines of this project.
• I have added appropriate tests (unit, integration, system).
• I have reviewed my changes before submitting this pull request.
• I have linked the issue or issues that are solved by the PR if any.
• I have agreed with the Contributor License Agreement (CLA).

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 85.13%. Comparing base (9095b51) to head (1c7e7d9).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6030      +/-   ##
==========================================
+ Coverage   85.08%   85.13%   +0.05%     
==========================================
  Files         166      166              
  Lines       62977    62936      -41     
==========================================
- Hits        53583    53581       -2     
+ Misses       9394     9355      -39     

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[SMoraisAnsys]

LGTM