IsolatedAsyncioTestCase sets up asyncio runner for skipped tests

[tiran]

Bug report

TestCase.run() is always executed, even for skipped tests. In fact the method checks for skipped and expected failure markers. The implementation of IsolatedAsyncioTestCase.run runs additional code around TestCase.run that does not obey the skipped marker. This was first discovered when GH-95736 broke tests on wasm32-emscripten. _setupAsyncioRunner should not be called if a test method or class is marked as skipped.

I have an easy fix for the issue.

[gvanrossum]

Maybe #96033 was meant to fix this too?

[kumaraditya303]

AFAIK this is already fixed by https://github.com/python/cpython/pull/96033.