Calling loop.sock_connect has a KeyError exception in the success path

[bdraco]

Bug report

Bug description:

Similar to #106527 and #106664

loop.sock_connect()

cpython/Lib/asyncio/selector_events.py

Line 266 in 616622c

except KeyError:

CPython versions tested on:

CPython main branch

Operating systems tested on:

Linux

Linked PRs

• gh-112989: asyncio: Reduce overhead to connect sockets with SelectorEventLoop #112991