Local agent token scope invalid outside commercial

Local agents do not honor cognitive_services_scope from config.  Hardcoded to commercial in semantic_kernel_loader.py.

[Update here](https://github.com/microsoft/simplechat/blob/352b1ae4521cf451918fbfbaf6213f1a1938bd09/application/single_app/semantic_kernel_loader.py#L320)