Stop tracking file paths in ML resources

[shreyas-goenka]

Changes

We probably don't need to track the paths in the ML resources post https://github.com/databricks/cli/pull/1414. The paths will now not be used anywhere for path interpolation in the API fields or any kind of validation.

Note: Given the use of dynamic typing it's not completely certain whether this change is safe. This will need to be validated.

Tests