### Apache Airflow version

main (development)

### What happened

1. When not providing `project_id` to `BigQueryGetDataOperator` in deferrable mode (`project_id=None`), the query generated by `generate_query` method is bugged, i.e.,: 

````sql
from `None.DATASET.TABLE_ID` limit ...
````

2. `as_dict` param does not work `BigQueryGetDataOperator`.

### What you think should happen instead

1. When `project_id` is `None` - it should be removed from the query along with the trailing dot, i.e.,:

````sql
from `DATASET.TABLE_ID` limit ...
````

2. `as_dict` should be added to the serialization method of `BigQueryGetDataTrigger`.

### How to reproduce

1. Create a DAG file with `BigQueryGetDataOperator` defined as follows:
```python
BigQueryGetDataOperator(
        task_id="bq_get_data_op",
        # project_id="PROJECT_ID",  <-- Not provided
        dataset_id="DATASET",
        table_id="TABLE",
        use_legacy_sql=False,
        deferrable=True
    )
````

2. 1. Create a DAG file with `BigQueryGetDataOperator` defined as follows:
```python
BigQueryGetDataOperator(
        task_id="bq_get_data_op",
        project_id="PROJECT_ID",
        dataset_id="DATASET",
        table_id="TABLE",
        use_legacy_sql=False,
        deferrable=True,
        as_dict=True
    )
````

### Operating System

Debian

### Versions of Apache Airflow Providers

_No response_

### Deployment

Official Apache Airflow Helm Chart

### Deployment details

_No response_

### Anything else

The `generate_query` method is not unit tested (which would have prevented it in the first place) - will be better to add one.

### Are you willing to submit PR?

- [X] Yes I am willing to submit a PR!

### Code of Conduct

- [X] I agree to follow this project's [Code of Conduct](https://github.com/apache/airflow/blob/main/CODE_OF_CONDUCT.md)

"""Assert the exception if require param not pass to BigQueryValueCheckOperatorAsync operator"""
        with pytest.raises(AirflowException) as missing_param:
            BigQueryValueCheckOperator(deferrable=True, **kwargs)
        assert missing_param.value.args[0] == expected
    def test_bigquery_value_check_empty(self):
        """Assert the exception if require param not pass to BigQueryValueCheckOperatorAsync operator"""
        expected, expected1 = (
            "missing keyword arguments 'sql', 'pass_value'",
            "missing keyword arguments 'pass_value', 'sql'",
        )
        with pytest.raises(AirflowException) as missing_param:
            BigQueryValueCheckOperator(deferrable=True, kwargs={})
        assert (missing_param.value.args[0] == expected) or (missing_param.value.args[0] == expected1)
    def test_bigquery_value_check_operator_execute_complete_success(self):
        """Tests response message in case of success event"""
        operator = BigQueryValueCheckOperator(
            task_id="check_value",
            sql="SELECT COUNT(*) FROM Any",
            pass_value=2,
            use_legacy_sql=False,
            deferrable=True,
        )
        assert (
            operator.execute_complete(context=None, event={"status": "success", "message": "Job completed!"})
            is None
        )
    def test_bigquery_value_check_operator_execute_complete_failure(self):