[Feature Request]: Drools Accumulator - add get fields button

### What would you like to happen?

Migration: https://issues.apache.org/jira/browse/HOP-4097

Drools accumulator is missing Get Fields functionality in Rule results GUI

If we have 50 fields in the input and we declare no one rule result in Rule result GUI, there is no output generated from Drools accumulator.

We have to declare all fields manually for any output.

There should be available option Get fields as in another components is.

example:


### Issue Priority

Priority: 3

### Issue Component

Component: Transforms