CI: Use xsel instead of xclip for numpydev
Hopefully fixes this flaky clipboard test

```
_________________________ test_raw_roundtrip[abcd...] __________________________
[gw1] linux -- Python 3.10.0 /usr/share/miniconda/envs/pandas-dev/bin/python

data = 'abcd...'

    @pytest.mark.single
    @pytest.mark.clipboard
    @pytest.mark.parametrize("data", ["\U0001f44d...", "Ωœ∑´...", "abcd..."])
    def test_raw_roundtrip(data):
        # PR #25040 wide unicode wasn't copied correctly on PY3 on windows
        clipboard_set(data)
>       assert data == clipboard_get()
E       AssertionError: assert 'abcd...' == 'Ωœ∑´...'
E         - Ωœ∑´...
E         + abcd...

pandas/tests/io/test_clipboard.py:313: AssertionError
```

green!! yay @meeseeksdev backport 1.4.x Something went wrong ... Please have a look at my logs.