FEAT: Enable gRPC usage and update import paths in EDB module

[Samuelopez-ansys]

Description

This pull request updates the way certain classes are imported from the pyedb package and modifies a test configuration default. The main focus is on standardizing imports to use the new generic.design_types module and enabling gRPC usage in tests by default.

Import updates for consistency:

• Changed the import paths for Edb and Siwave classes in src/ansys/aedt/core/edb.py to use pyedb.generic.design_types instead of their previous locations, which helps centralize and standardize type definitions.

Test configuration change:

• Updated the default value of use_pyedb_grpc to True in tests/conftest.py, enabling gRPC-based communication in tests by default.

Issue linked

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

Checklist

• I have tested my changes locally.
• I have added necessary documentation or updated existing documentation.
• I have followed the coding style guidelines of this project.
• I have added appropriate tests (unit, integration, system).
• I have reviewed my changes before submitting this pull request.
• I have linked the issue or issues that are solved by the PR if any.
• I have agreed with the Contributor License Agreement (CLA).

[svandenb-dev]

LGTM