run validation of quickstart.yaml and arch_config_full_reference.yaml as part of unit tests

[adilhafeez]

Right now arch_config_full_reference.yaml file is verified in rust code base but we don't run this file through schema validation we've configured for our usual run. Ask here is to run schema validation of arch_config_full_reference.yaml as part of github actions.

we need to validate both arch_config_full_reference.yaml and quickstart.yaml files
here is the quickstart.yaml file
code in our cli that validates schema: https://github.com/katanemo/archgw/blob/main/arch/tools/cli/main.py#L165-L169