REFACTOR: pathlib refactor primitives_circuit.py

[anur7]

Description

Continuation of pathlib refactoring

Issue linked

Issue #5180

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

Attention: Patch coverage is 90.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 85.08%. Comparing base (3da9057) to head (3fc05fc).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6024      +/-   ##
==========================================
- Coverage   85.08%   85.08%   -0.01%     
==========================================
  Files         166      166              
  Lines       62978    62977       -1     
==========================================
- Hits        53587    53581       -6     
- Misses       9391     9396       +5     

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[gmalinve]

LGTM.