FIX: Improved compute_icn method to support 2027.1 new settings

[maxcapodi78]

Description

Improved compute_icn method to support 2027.1 new settings.
the parameter use_pcie_icn is now able to handle as input an integer, str or bool to be able also to manage a customer_user settings.

Application: circuit
AEDT-Version: 27.1
Platform: windows, linux, rocky

Issue linked

Add support to new settings for ICN computed in 2027.1.
Improved compute_icn method to support 2027.1 new settings.
the parameter use_pcie_icn is now able to handle as input an integer, str or bool to be able also to manage a customer_user settings.

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(s) that are solved by the PR if any.
• I have assigned this PR to myself.
• I have added the minimum version decorator to any new backend method implemented.
• I have agreed with the Contributor License Agreement (CLA).

[Samuelopez-ansys]

Mergin because pre-commit is working fine locally