PDK should not error out on validation of non-converted modules

[trevor-vaughan]

Describe the bug

When running pdk validate on an unconverted module, I get an error stating that the command cannot be run without converting the module first.

This seems to be a bug since the format of a given module's helper files is orthogonal whether or not is is valid.

To Reproduce

Go to any unconverted module, run pdk validate watch it tell you that you need to convert your module before trying to validate it.

Expected behavior

The module would be validated.

[natemccurdy]

Probably related to, or at least similar to, my request here: #980

[trevor-vaughan]

@natemccurdy Pretty much the exact same thing, yes.