Fix flaky CI test

[tatiana]

Quite often, the "Run-Integration-Tests-Expensive (3.11, 2.6)" tests are failing when trying to run the Databricks integration test.

Example:

FAILED tests/test_example_dags.py::test_example_dag[example_cosmos_python_models] - airflow.exceptions.AirflowException: dbt invocation did not complete with unhandled error: Database Error
  HTTPSConnectionPool(host='adb-2703548196728655.15.azuredatabricks.net', port=443): Max retries exceeded with url: /sql/1.0/warehouses/368fe30b92228713 (Caused by ResponseError('too many 503 error responses'))

https://github.com/astronomer/astronomer-cosmos/actions/runs/12748493855/job/35528800865?pr=1456

We need to see alternatives to make this more stable and fail less often.