Remove support for re-serializing a Serialized Operator

[kaxil]

Bringing #53340 back but only for removing Reserialized BaseOp.

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[kaxil]

Still needed for roundtrip.

  FAILED airflow-core/tests/unit/serialization/test_serialized_objects.py::test_serialized_dag_to_dict_and_from_dict_gives_same_result_in_tasks - TypeError: string indices must be integers
  FAILED airflow-core/tests/unit/serialization/test_serialized_objects.py::test_serialized_dag_get_run_data_interval[pre-AIP-39-should-infer] - AttributeError: 'LazyDeserializedDAG' object has no attribute '_real_dag'

[ashb]

Does that test make sense anymore? If it's only used in tests I don't think it's worth keeping around

[kaxil]

Does that test make sense anymore? If it's only used in tests I don't think it's worth keeping around

Yup, fixed it. ready for review again

[potiuk]

This one broke main - not sure how but the tests pass when I revert it. #54420

[kaxil]

This one broke main - not sure how but the tests pass when I revert it. #54420

huh, no clue. Will try again tomorrow :)

[kaxil]

Another attempt: #54428