Add support for parse_json on complex json structures with arrays and nested arrays

[graytaylor0]

Is your feature request related to a problem? Please describe.
As a user with data in the format of

{
   "array_one": [
        {
           "array_two": [
                {
                     "field_one": {
                          "json_string": "{ \"key\": \"value\" }"
                     }
                },
                {
                     "field_one": {
                          "json_string": { \"key_two\": \"value-two\" }
                     }
                }
           ]
       },
       {
           "array_two": [
                {
                     "field_one": {
                          "json_string": "{ \"key\": \"value\" }"
                     }
                },
                {
                     "field_one": {
                          "json_string": { \"key_two\": \"value-two\" }
                     }
                }
           ]
       }
   ]
}

I would like to parse the nested json for the json_string in all objects of the nested arrays. This is not currently possible with the parse_json processor as it only supports json_pointer

Describe the solution you'd like
A new configuration to support this use case. One idea would be to utilize JSON path as the above example can be represented as this json path

- parse_json:
        source_path: "array_one[*].array_two[*].field_one.json_string"

And this would convert all of the nested json fields to valid json format.

Describe alternatives you've considered (Optional)
A clear and concise description of any alternative solutions or features you've considered.

Additional context
Add any other context or screenshots about the feature request here.