feat(metabase): use instance label for urn component

[StewartJingga]

new mandatory config to label extracted metabase metadata.

source:
  name: metabase
  config:
    ...
    instance_label: my-metabase

this will be used as the urn component like below

{
  "urn": "metabase::my-metabase/dashboard/192"
}

[GrayFlash]

@StewartJingga the test for elasticsearch fails in cli as well as my local. Can you check it once??

[GrayFlash]

sorry it passed locally, I guess the order in which we get output fields is inconsistent. Shouldn’t be an issue for this PR.