fix: remove exceptions on mapdl object deletion

[germa89]

Description

Fix some exceptions raised on tests when deleting mapdl class:

tests/test_mapdl.py::test_jobname PASSED                                 [ 15%]
tests/test_mapdl.py::test_path_with_single_quote PASSED                  [ 15%]
tests/test_mapdl.py::test_ip_hostname_in_start_parm[myhostname] PASSED   [ 15%]Exception ignored in: <function MapdlGrpc.__del__ at 0x7fcc395860c0>
Traceback (most recent call last):
  File "/__t/Python/3.12.9/x64/lib/python3.12/site-packages/ansys/mapdl/core/mapdl_grpc.py", line 3858, in __del__
    self.kill_job(self.jobid)
  File "/__t/Python/3.12.9/x64/lib/python3.12/site-packages/ansys/mapdl/core/mapdl_grpc.py", line 3839, in kill_job
    subprocess.Popen(cmd)  # nosec B603
    ^^^^^^^^^^^^^^^^^^^^^
  File "/__t/Python/3.12.9/x64/lib/python3.12/subprocess.py", line 1028, in __init__
    self._execute_child(args, executable, preexec_fn, close_fds,
  File "/__t/Python/3.12.9/x64/lib/python3.12/subprocess.py", line 1963, in _execute_child
    raise child_exception_type(errno_num, err_msg, err_filename)
FileNotFoundError: [Errno 2] No such file or directory: 'scancel'
tests/test_mapdl.py::test_none_on_selecting[lsel] PASSED                 [ 15%]

Issue linked

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

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

All modified and coverable lines are covered by tests ✅

Project coverage is 88.36%. Comparing base (6addc88) to head (9166f87).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3826      +/-   ##
==========================================
- Coverage   88.51%   88.36%   -0.15%     
==========================================
  Files         187      187              
  Lines       14761    14761              
==========================================
- Hits        13065    13044      -21     
- Misses       1696     1717      +21     

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[germa89]

It seems there is no more exception messages on the CICD. Merging....

@pyansys-ci-bot LGTM.

[pyansys-ci-bot]

✅ Approving this PR because germa89 said so in here 😬