[Feature Request] Mapping String to Array

[adplotzk]

This is a feature request which is requested a processor to implement the following ETL functionality to handle Mapping string to array.

#SOURCE

         "some_source": [
                {
                    "src_key_1": "val_1"
                }
            ]

#TO

        "some_dest": {
            "dest_key_1": ["val_1"]
        }

#MAPPING

    - from_key: "some_source[]/src_key_1/"
      to_key: "some_dest/dest_key_1[]"
      overwrite_if_to_key_exists: true

[oeyh]

This can be achieved with #3867 in combination with rename_keys processor.

[oeyh]

Closed via #3867