processing pipeline - prefix all fields functions

## What?
A function is needed that allows to prefix all given fields in a message without naming them all in a rule.

## Why?
When you ingest data and want to prefix on certain conditions all fields you need to know all fields and write processing rules that rename fields. Each field need to be written separate.

Should fields be added, removed or renamed the processing needs to be adjusted. Having the ability with a single rule to prefix all fields of a message would remove possible failures and problems.

[Z#844297]