feat: redirect MAPDL console output to a file

[germa89]

Description

As the title.

Now you can do:

from ansys.mapdl.core import launch_mapdl

mapdl = launch_mapdl(mapdl_output="apdl.out")
# create a file with the console output
assert os.path.exists("apdl.out")
with open("apdl.out", "r") as fid:
    assert "START GRPC SERVER" in fid.read()

Issue linked

Close #3595

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 36.36364% with 14 lines in your changes missing coverage. Please review.

Project coverage is 86.94%. Comparing base (afad43e) to head (23a5683).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3596      +/-   ##
==========================================
- Coverage   86.97%   86.94%   -0.04%     
==========================================
  Files         187      187              
  Lines       14623    14641      +18     
==========================================
+ Hits        12719    12730      +11     
- Misses       1904     1911       +7