Skip a repository virtualenv when copying the wheel sourceThe install instructions create a .venv in the repository root. Its bin/pythonis a symlink to the host interpreter, so a test run inside the container followsit to a path that does not exist there, copytree collects the error and raises,and every test that needs a built wheel errors before it runs.CI never sees this: it checks out fresh and never creates a venv. It only showsup for someone who followed the install steps and then ran the suite through.docker/docker-compose.yml, which is how it was reported.The ignore list moves into wheel_source_ignore() so the new test asserts againstthe patterns the fixture actually uses rather than a copy of them.