Add support for tag declarations to the config / meta per model

[eraliod]

Is your feature request related to a problem? Please describe. would help clean up the configuration and avoid repetitive code if we can configure tags for all tests in a model / source

Describe the solution you'd like

sources:
  -  name: agent
     meta:
       elementary:
         tags: ["sources"]
     tests:
       - elementary.schema_changes:
       - elementary.volume_anomalies:

models:
  -  name: agent
     config:
       elementary:
         tags: ["marts"]
     tests:
       - elementary.schema_changes:
       - elementary.volume_anomalies:

Describe alternatives you've considered tags has to be repeated under each test

sources:
  -  name: agent
     tests:
       - elementary.schema_changes:
           tags: ["sources"]
       - elementary.volume_anomalies:
           tags: ["sources"]

Additional context I thought setting tags in the meta / config would work and tested it on 0.11.1 but it does not appear to work when I try to run dbt test --select tag:sources. Inline tags declarations do work as intended.

Would you be willing to contribute this feature? Not able to contribute at this time