[Bug]: pyOCD discovery fails on devices with a hidden core

[TeoMahnic]

Description

During CoreSight discovery, pyOCD attempts to associate each detected core with a corresponding pname entry from the CMSIS Pack description. The mapping step fails when pyOCD encounters a core Access Port (AP) that is not represented in the .pdsc file, which raises a critical error and pyOCD stops the execution.

Steps to Reproduce

No response

Expected Behavior

pyOCD should tolerate such hidden cores gracefully and continue operation, rather than terminating with a critical error when a discovered core has no corresponding entry in the CMSIS Pack description.

Additional Information

This is blocking pyOCD from being used for multiple Microchip device families.

Issue: pyocd/pyOCD#1800
PR: pyocd/pyOCD#1801

This PR addresses only the internal pack support. The patch should also be applied to cbuild-run targets.