Provide OL SQL parser as internal OpenLineage provider API

[mobuchowski]

Body

To easily provide OpenLineage events from SQL-based operators, we want to add SQL parser API that other providers can use. The API should be stable.

There are two proposed options:

• Provide literal API - classes that other providers could import and use directly
• Pass parser class to get_openlineage_facets_* methods that the operators could use, but we need to be careful to not pass it to openlineage-airflow defined methods, as those won't accept it.

Committer

• I acknowledge that I am a maintainer/committer of the Apache Airflow project.