[csolution] cbuild-run.yml must not have `dbgconf:` node if the device description does not specify `<debugvars configfile=...>` attribute

[jkrech]

Describe the bug
cbuild-run.yml shows dbgconf: node even if the device description does not specify <debugvars configfile=...> attribute.

To Reproduce
create a new solution for a device that does not have a configfile specified and inspect the *.cbuild-run.yml file
Note that when a launch.json is created by CMSIS Solution Extension and the pyOCD is launched an error message is displayed:

Expected behavior
cbuild-run.yml must not have dbgconf: node if the device description does not specify <debugvars configfile=...> attribute

Environment (please complete the following information):

• csolution
• Version 2.9.0
• OS: [e.g. windows/linux/darwin]

[KeilChris]

Verified with https://github.com/Open-CMSIS-Pack/cmsis-toolbox/actions/runs/15457111218