Calculate and track DAG version

[jedcunningham]

Body

We need to calculate the DAG version based on the serialized DAG, and start tracking it on the task instance try level.

Committer

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

[ephraimbuddy]

PR: #42517
PR: #42547

[ephraimbuddy]

PR: #42690