`get_event_loop_policy` will be deprecated

[frenzymadness]

We're already testing some projects with Python 3.14 (alpha 4) and in that get_event_loop_policy will be deprecated and slated for removal from 3.16.

Some projects consider warnings as errors in tests, making the tests fail.

See https://docs.python.org/dev/whatsnew/3.14.html#id5 for more information.

[Dreamsorcerer]

#1025

[frenzymadness]

Thanks @Dreamsorcerer. Closing as a duplicate of #1025