Upgrade websockets.legacy usage #16982
Description
Describe the current behavior
Currently we rely on imported objects from websockets.legacy which is deprecated (as can be seen here, for example: https://github.com/PrefectHQ/prefect/actions/runs/13147657643/job/36689175326?pr=16972).
Describe the proposed behavior
We need to plan to move to the newer asyncio implementation following the guidelines outlined here. We believe this should be straightforward as we don't rely on anything deep cut, but opening this issue to track so we don't get caught off guard with an upgrade.
Example Use
No response
Additional context
No response