feat: Test config templating

[mbevc1]

Is your feature request related to a problem? Please describe.
When I'm debugging configuration issues I'd like to have an option to parse config templating and check end state.

Describe the feature you'd like
I know lza-validator does some checking and processes replacements, but I didn't see any option to just check the parsing and seeing the parsed configuration files.

Additional context
n/a