### Apache Airflow version

Other Airflow 2 version (please specify below)

### What happened

Greetings!
Recently I’ve faced a problem. It seems that assigning object, which can’t be serialized to JSON, to the dag_run.conf dict cause critical errors with UI.
After executing code example in "How to reproduce": 
Grid representation of the DAG breaks with following result:
<img width="800" alt="Pasted Graphic" src="https://github.com/apache/airflow/assets/79107237/872ccde5-500f-4484-a36c-dce6b7112286">
Browse -> DAG Runs also becomes unavailable.
<img width="800" alt="Pasted Graphic 1" src="https://github.com/apache/airflow/assets/79107237/b4e3df0c-5324-41dd-96f3-032e706ab7a9">
Dag itself continues to work correctly, this affects only UI graph and dagrun/list/
I suggest to use custom dictionary with restriction on setting non json values.

### What you think should happen instead

Raise an error

### How to reproduce

Execute following task. 
Composer 2 version 2.4.2
Airflow version 2.5.3
```
@task 
def test_task(**context):
    context['dag_run'].conf["test"] = np.int64(1234)
```

### Operating System

Ubuntu 20.04.6 LTS

### Versions of Apache Airflow Providers

_No response_

### Deployment

Google Cloud Composer

### Deployment details

_No response_

### Anything else

_No response_

### 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)

TI.task_id == task.task_id,
                TI.run_id == self.run_id,
            )
        )
        existing_indexes = set(query)
        removed_indexes = existing_indexes.difference(range(total_length))
        if removed_indexes:
            session.execute(
                update(TI)
                .where(
                    TI.dag_id == self.dag_id,
                    TI.task_id == task.task_id,
                    TI.run_id == self.run_id,
                    TI.map_index.in_(removed_indexes),
                )
                .values(state=TaskInstanceState.REMOVED)
            )
            session.flush()
        for index in range(total_length):
            if index in existing_indexes:
                continue
            ti = TI(task, run_id=self.run_id, map_index=index, state=None)
            self.log.debug("Expanding TIs upserted %s", ti)
            task_instance_mutation_hook(ti)
            ti = session.merge(ti)
            ti.refresh_from_task(task)
            session.flush()
            yield ti
    @staticmethod
    def get_run(session: Session, dag_id: str, execution_date: datetime) -> DagRun | None: