relates to: #915

when using dataFrom users may want to rewrite the key so that it is easier for them to consume the secrets.
We have three cases to consider:

1. dataFrom.extract
2. dataFrom.find with name/regexp
3. dataFrom.find with tags

As outlined in the above mentioned issue: it would be quite convenient to have regexp capture groups. However, we still need to address the other two use cases.

Out of scope:

• we also need a way to template keys in target.template.data[$key]