Select pipeline for DAG generation

[michalzelechowski-getindata]

Similar to vanilla kedro -p option, which selects pipeline to be operated, airflow-k8s plugin could allow selection of specific pipeline for DAG generation.
That functionality could be useful in bigger projects, were pipelines are complex, can be separated but share common nodes.

[michalzelechowski-getindata]

@em-pe Do you think CLI parameter would be sufficient or we should allow this to be part of the config? In case of config, we could use it for separation of runtime parameters.

[em-pe]

@michalzelechowski-getindata CLI should be sufficient I think