Consider shorter / lesser verbose standard provider import path for users

### Body

A discussion maybe for later, but the entire canonical path in dags, like:
```
from airflow.providers.standard.operators.empty import EmptyOperator
```

seems to be pretty verbose. Consider having something like:
```
from airflow.providers.standard import EmptyOperator
```

OR

```
from airflow.providers.standard.operators import EmptyOperator
```

### Committer

- [x] I acknowledge that I am a maintainer/committer of the Apache Airflow project.

Start by reviewing the canonical provider import path shown in the issue and locating its uses in DAGs. Compare the proposed shorter import forms and document or implement a consistent public import path, with completion demonstrated by updated imports and validation that the existing provider exports remain usable.

Written by the indexing model from the issue text.