gh-126890: Restore stripped ssl docstrings

[ZeroIntensity]

In GH-124993, I forgot to carry over some of the docstrings to AC. This adds all of them back.

• Issue: Restore docstrings in ssl #126890

[encukou]

At a first glance at those warnings, it looks like this might need some changes in clinic :(
Shout if you want me to help.

[neonene]

Please add a docstring for _ssl.MemoryBIO.pending.

I think the warnings are related to the following regression:

3.12 on Windows:

>>> help(_ssl._SSLSocket.context)
Help on getset descriptor _ssl._SSLSocket.context:

context
    _setter_context(ctx)
    This changes the context associated with the SSLSocket. This is typically
    used from within a callback function set by the sni_callback
    on the SSLContext to change the certificate information associated with the
    SSLSocket before the cryptographic exchange handshake messages
>>>

This PR:

>>> help(_ssl._SSLSocket.context)
Help on getset descriptor _ssl._SSLSocket.context:

context

>>>

[ZeroIntensity]

As far as I can tell, the warnings are a clinic bug.

[erlend-aasland]

Can we tear out the Argument Clinic bug fix as a separate PR?

[ZeroIntensity]

Yeah, I'll do that. A fair warning: it might take me a little while to get the PR up; I'm currently on a slow connection and GitHub takes forever.