[BUG] Read-only inputs are not as supposed to be

[hasan7n]

There is a typo in the passed MLCube parameters that make input folders and files read-only:
We use e.g.:
Ptasks.evaluate.parameters.input.predictions.opts

but it should be:

-Ptasks.evaluate.parameters.inputs.predictions.opts

(There was a missing dash - and a missing s in inputs)

Currently, MLCube ignores the parameters (because there is a typo) and hence doesn't enforce the inputs to be read-only.
Also, it's may be good to have an integration test for such scenario.

[hasan7n]

tracked in #488