Added autodetect arg to Create External Table Operator

[shahkshitij15]

closes: #22129

Added autodetect argument to BigQueryCreateExternalTable Operator

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[github-actions]

The PR is likely OK to be merged with just subset of tests for default Python and Database versions without running the full matrix of tests, because it does not modify the core of Airflow. If the committers decide that the full tests matrix is needed, they will add the label 'full tests needed'. Then you should rebase to the latest main or amend the last commit of the PR, and push it with --force-with-lease.

[turbaszek]

Can we please make sure that this change is covered in tests?

[eladkal]

@shahkshitij15 can you please fix failing test?
https://github.com/apache/airflow/runs/5612449295?check_suite_focus=true#step:9:3155

 ==================================== ERRORS ====================================
  _ ERROR collecting tests/providers/google/firebase/operators/test_firestore_system.py _
  tests/providers/google/firebase/operators/test_firestore_system.py:20: in <module>
      from airflow.providers.google.firebase.example_dags.example_firestore import (
  airflow/providers/google/firebase/example_dags/example_firestore.py:119: in <module>
      "csvOptions": {"skipLeadingRows": 1},
  airflow/models/baseoperator.py:386: in apply_defaults
      result = func(self, **kwargs, default_args=default_args)
  airflow/providers/google/cloud/operators/bigquery.py:1111: in __init__
      raise ValueError("You provided both `table_resource` and exclusive keywords arguments.")
  E   ValueError: You provided both `table_resource` and exclusive keywords arguments.
  =============================== warnings summary ===============================

[eladkal]

fixed in #22710