Refactor code generation for Kubeflow Pipelines

[ptitzler]

Is your feature request related to a problem? Please describe.

• Refactor the Kubeflow Pipelines processor to generate Python DSL as intermediary output format
• Expose the generated DSL in the export wizard in addition to the already support static configuration file (YAML)

Additional context

• The changes have no impact on regular users because the changes are completely transparent.
• Advanced users will be able to customize the generated Python DSL, if desired.
• With these changes in place, support for pipeline parameters can be added.

[dvaldivia]

Exposing the kubeflow inout parameters for a component is highly desirable, so pipelines can be hooked into AutoML, I think even a simpler approach would be to expose add support for populating a component parameter inputs from kubeflow itself, just like we have a dropdown today for "put a string, read file, read output" we should have a "read from kubeflow" or similar

[ptitzler]

Perhaps I am misunderstanding your comment, but pipeline parameters will enable users to do that, as outlined here. The motivation section in the linked doc includes a screen capture of how pipeline parameters are exposed in the Kubeflow Central dashboard.