test_socket tests fail with kernel lacking support for IPPROTO_UDPLITE

[mcepl]

Bug report

Bug description:

When running on the kernel without support for UDPLite, setup of tests (function clientSetUp) in test_socket fails:

self.cli = socket.socket(socket.AF_INET, socket.SOCK_DGRAM, socket.IPPROTO_UDPLITE)

this command raises OSError.

CPython versions tested on:

3.14

Operating systems tested on:

Linux

Complete build logs

Linked PRs

• gh-149078: test_socket: verify runtime kernel support for UDPLite #149081