o-nikolas opened a new pull request, #46944:
URL: https://github.com/apache/airflow/pull/46944
In preparation of deprecating support in Airflow core for the old hardcoded
hybrid executors in V3, mark them as deprecated and emit warnings when they are
loaded. Also mark multi exec as stable to give users somewhere to migrate
towards.
To broadcast the message of their deprecation this PR:
- Adds a deprecation warning when these old hybrid executors are loaded
- Documentation has been updated to note that they are deprecated and
provide steps for migration.
- A news fragment added as well.
The warning message:

Rendered docs:

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**^ Add meaningful description above**
Read the **[Pull Request
Guidelines](https://github.com/apache/airflow/blob/main/contributing-docs/05_pull_requests.rst#pull-request-guidelines)**
for more information.
In case of fundamental code changes, an Airflow Improvement Proposal
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In case of a new dependency, check compliance with the [ASF 3rd Party
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