[3.14] gh-145548: Use VMADDR_CID_LOCAL in VSOCK socket tests (GH-145589)

[miss-islington]

Prefer VMADDR_CID_LOCAL instead of VMADDR_CID_ANY for bind() in the
server. Skip the test if bind() fails with EADDRNOTAVAIL.

Log vsock CID in test.pythoninfo.
(cherry picked from commit 6c8c72f)

Co-authored-by: Victor Stinner vstinner@python.org

• Issue: VSOCK test_socket.testStream() fails on aarch64 Fedora Stable 3.x buildbot #145548

[vstinner]

I will wait for Fedora Stable buildbots to pass on the main branch before merging the change to the 3.14 branch.

[vstinner]

Fedora Stable 3.x buildbots:

• https://buildbot.python.org/#/builders/125
• https://buildbot.python.org/#/builders/543
• https://buildbot.python.org/#/builders/90
• https://buildbot.python.org/#/builders/1636

[vstinner]

Fedora Stable 3.x buildbots

The 3 which were failing are back to green :-) The 4th still pass.