feat: refactoring launcher module

[germa89]

Description

As the title to facilitate the future HPC additions.

Issue linked

NA

Checklist

• I have visited and read Develop PyMAPDL.
• I have tested my changes locally
• I have added necessary documentation or updated existing documentation.
• I have followed the PyMAPDL coding style guidelines.
• I have added appropriate unit tests that also ensure the minimal coverage criteria.
• I have reviewed my changes before submitting this pull request.
• I have linked the issue or issues that are solved to the PR if any.
• I have assigned this PR to myself.
• I have marked this PR as draft if it is not ready to be reviewed yet.
• I have made sure that the title of my PR follows Commit naming conventions (e.g. feat: adding new MAPDL command)

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[codecov]

Codecov Report

Attention: Patch coverage is 78.21782% with 132 lines in your changes missing coverage. Please review.

Project coverage is 86.52%. Comparing base (20f82d1) to head (2b5c8c9).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3649      +/-   ##
==========================================
- Coverage   87.11%   86.52%   -0.60%     
==========================================
  Files         187      196       +9     
  Lines       14694    14940     +246     
==========================================
+ Hits        12801    12927     +126     
- Misses       1893     2013     +120