Target config extended configuration

[pdelewski]

This PR implements new variant of target configuration where it's a list not an array and can have more attributes (potentially in the future)

Current variant is still supported and is a fallback in the case extended version is missing

Below

  kibana_sample_data_flights:
    target:
    - my-clickhouse-data-source:
        useCommonTable: true

is equivalent of

  kibana_sample_data_flights:
    target: [my-clickhouse-data-source]
    useCommonTable: true

PR contains a bit of duplicated code, something that I would prefer fix in next PR.

[avelanarius]

Is there some way to avoid having to write {}?

[pdelewski]

I don't know. It seems to be yaml syntax specific

[avelanarius]

The new configuration syntax looks OK, but I think this looks strange:

        kibana_sample_data_flights:
          target:
            - my-clickhouse-data-source: {}

and it'd be great if something like this was possible instead:

        kibana_sample_data_flights:
          target:
            - my-clickhouse-data-source

[pdelewski]

The new configuration syntax looks OK, but I think this looks strange:

        kibana_sample_data_flights:
          target:
            - my-clickhouse-data-source: {}

and it'd be great if something like this was possible instead:

        kibana_sample_data_flights:
          target:
            - my-clickhouse-data-source

Let me check that again. Ok, this seems to be working. I think I made some mistake previously. I will update config