Fix: Raising `ValueError` when using ips within pool library

[germa89]

Description

As the title. Latest changes in MapdlPool always passes the IP argument, so it is better to not raise this specific error when using pool.

Issue linked

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

Checklist

• [x] I have visited and read Develop PyMAPDL.
• [x] I have tested my changes locally
• [x] I have added necessary documentation or updated existing documentation.
• [x] I have followed the PyMAPDL coding style guidelines.
• [x] I have added appropriate unit tests that also ensure the minimal coverage criteria.
• [x] I have reviewed my changes before submitting this pull request.
• [x] I have linked the issue or issues that are solved to the PR if any.
• [x] I have assigned this PR to myself.
• [x] I have marked this PR as draft if it is not ready to be reviewed yet.
• [x] 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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