Detect !~ in roles

[hugovk]

✅ :meth:`~list.pop` can be used to display pop().

✅ :meth:`!list.pop` can be used to display list.pop() and avoid reference warnings.

❌ :meth:`!~list.pop` cannot be used to display pop() and avoid reference warnings, instead it shows ~list.pop()

✅ We should instead write :meth:`!pop` to display pop().

Real life example: python/cpython#127054 (review)

Can we detect this with Sphinx Lint?