[Feature Request]: Mark/check mandatory fields

### What would you like to happen?

Currently it is not clear which fields are when filling out the Run Configuration. E.g. Beam DataFlow pipeline engine has a lot of options available, but not all are mandatory. Please mark the fields that are mandatory - this will make it easier to understand for everyone what is required and what not.

### Issue Priority

Priority: 3

### Issue Component

Component: Hop Gui

Start in the Hop Gui Run Configuration screen and inspect how the Beam DataFlow pipeline engine options are rendered. Identify which fields are mandatory, mark them consistently in the interface, and verify that optional fields remain distinguishable from required ones.

Written by the indexing model from the issue text.