[3.11] gh-88177: Revert the new asyncio.sslproto implementation

[ambv]

This reverts #31275 and #31597 for Python 3.11 which enters Release Candidate stage tomorrow while an unresolved issue is present in the new code.

See #95573 for details.

• Issue: Borrow asyncio ssl implementation from uvloop #88177

[bedevere-bot]

🤖 New build scheduled with the buildbot fleet by @ambv for commit 722e189 🤖

If you want to schedule another build, you need to add the ":hammer: test-with-buildbots" label again.

[ambv]

This PR will hopefully not be necessary. I did stress-test it with -j8 -F on my M1 Max and it looks solid:

== Tests result: INTERRUPTED == Test suite interrupted by signal SIGINT. 1696 tests OK. Total duration: 4 hour 42 min Tests result: INTERRUPTED ________________________________________________________ Executed in 282.18 mins fish external usr time 1180.99 mins 43.00 micros 1180.99 mins sys time 34.76 mins 366.00 micros 34.76 mins