Skip tests that use workspaces on windows

tests/integration/autotools.py

tests/integration/build-tree.py

tests/integration/build-uid.py

tests/integration/cachedfail.py

tests/integration/cmake.py

tests/integration/compose.py

tests/integration/make.py

tests/integration/manual.py

tests/integration/messages.py

tests/integration/pip_element.py

tests/integration/pip_source.py

tests/integration/pullbuildtrees.py

tests/integration/script.py

tests/integration/shell.py

tests/integration/sockets.py

tests/integration/source-determinism.py

tests/integration/stack.py

tests/integration/symlinks.py

tests/integration/workspace.py

tests/sandboxes/missing-command.py