Improve BQ async error handling

[tatiana]

Currently, if someone attempts to run simple_dag_async without previously installing apache-airflow-providers-google, they will face this very ugly error:

Traceback (most recent call last):
  File "/Users/tati/Code/cosmos-fresh/astronomer-cosmos/venv/lib/python3.9/site-packages/airflow/models/dagbag.py", line 383, in parse
    loader.exec_module(new_module)
  File "<frozen importlib._bootstrap_external>", line 850, in exec_module
  File "<frozen importlib._bootstrap>", line 228, in _call_with_frames_removed
  File "/Users/tati/Code/cosmos-fresh/astronomer-cosmos/dags/simple_dag_async.py", line 21, in <module>
    simple_dag_async = DbtDag(
  File "/Users/tati/Code/cosmos-fresh/astronomer-cosmos/cosmos/airflow/dag.py", line 26, in __init__
    DbtToAirflowConverter.__init__(self, *args, **specific_kwargs(**kwargs))
  File "/Users/tati/Code/cosmos-fresh/astronomer-cosmos/cosmos/converter.py", line 328, in __init__
    self.tasks_map = build_airflow_graph(
  File "/Users/tati/Code/cosmos-fresh/astronomer-cosmos/cosmos/airflow/graph.py", line 591, in build_airflow_graph
    task_or_group = conversion_function(  # type: ignore
  File "/Users/tati/Code/cosmos-fresh/astronomer-cosmos/cosmos/airflow/graph.py", line 379, in generate_task_or_group
    task = create_airflow_task(task_meta, dag, task_group=model_task_group)
  File "/Users/tati/Code/cosmos-fresh/astronomer-cosmos/cosmos/core/airflow.py", line 36, in get_airflow_task
    airflow_task = Operator(
  File "/Users/tati/Code/cosmos-fresh/astronomer-cosmos/venv/lib/python3.9/site-packages/airflow/models/baseoperator.py", line 506, in apply_defaults
    result = func(self, **kwargs, default_args=default_args)
  File "/Users/tati/Code/cosmos-fresh/astronomer-cosmos/cosmos/operators/airflow_async.py", line 75, in __init__
    super().__init__(
  File "/Users/tati/Code/cosmos-fresh/astronomer-cosmos/venv/lib/python3.9/site-packages/airflow/models/baseoperator.py", line 506, in apply_defaults
    result = func(self, **kwargs, default_args=default_args)
  File "/Users/tati/Code/cosmos-fresh/astronomer-cosmos/cosmos/operators/_asynchronous/base.py", line 50, in __init__
    async_operator_class = self.create_async_operator()
  File "/Users/tati/Code/cosmos-fresh/astronomer-cosmos/cosmos/operators/_asynchronous/base.py", line 69, in create_async_operator
    async_class_operator = _create_async_operator_class(profile_type, "DbtRun")
  File "/Users/tati/Code/cosmos-fresh/astronomer-cosmos/cosmos/operators/_asynchronous/base.py", line 34, in _create_async_operator_class
    raise ImportError(f"Error in loading class: {class_path}. Unable to find the specified operator class.") from e
ImportError: Error in loading class: cosmos.operators._asynchronous.bigquery.DbtRunAirflowAsyncBigqueryOperator. Unable to find the specified operator class.

The goal with this ticket is to give the same error handling as other parts of Cosmos by raising a more graceful error message.

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[codecov]

Codecov Report

Attention: Patch coverage is 57.14286% with 3 lines in your changes missing coverage. Please review.

Project coverage is 97.40%. Comparing base (b309dac) to head (4e3b74f).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
cosmos/operators/_asynchronous/bigquery.py	57.14%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1597      +/-   ##
==========================================
- Coverage   97.46%   97.40%   -0.06%     
==========================================
  Files          80       80              
  Lines        4937     4942       +5     
==========================================
+ Hits         4812     4814       +2     
- Misses        125      128       +3     

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