Fix OneOf -type rendering and validation

[otahontas]

Describe the bug

Our form rendeder and Yup-schema builder dont' currently work well with oneOf -schema keywords. For this problem, we could follow react-jsonschema-forms approach where each option of OneOf -array are presented as select field, and after user has selected one option, that option is rendered. Look for "Policy URL / policy text" in policy schema for example

Following changes should be made:

• Optional form field rendering based on user select, see formik docs for dependent fields and array-based rendering
• Custom config to yup schema, where oneOf types are better recognized

To Reproduce

Steps to reproduce the behaviour:

1. open fill form option for either run, experiment, analysis or policy
2. Form renders, but only partially. See console for errors.

Expected behavior

Form renders without problems