[ML] the component output should support primitive types

**Is your feature request related to a problem? Please describe.**
Currently, if we want to create a component which is reusable, we need to have some input which can take both parameter input and the output of the other components. it is not possible with current apis. a workaround is to create 2 inputs, one input only take primitive input and another one take json file and manually parse it. however, it is a very dirty hack. is there plan to fix that?

**Describe the solution you'd like**
the component output should support primitive types

**Describe alternatives you've considered**

**Additional context**