REFACTOR: Remove pyedb function handler

[SMoraisAnsys]

Contrary to pyaedt where there seems to be value to keep a function handler, using a function handler in pyedb does not seem to add much value (for example, no value to redirect info to UI or to be more fault tolerant). More over, it hides under the hood issues. That's something that we found out last week when working on an example over Materials.

Change proposed: removal of the function handler and direct handling of the raised methods.