In UnixRule (and probably also in other rules that use
print_dict_values()` and `initialize_cond_dict()`), the handling of
peers with a value that is quoted and/or needs to be quoted was broken
because
- quotes didn't get stripped in `initialize_cond_dict()`
- `print_dict_values()` didn't use `quote_if_needed()`
Note: print_dict_values also handles integers (like network ports).
Convert them to a string so that `if ' ' in data` in `quote_if_needed()`
doesn't explode.
Also enable the test that uncovered this bug.
`?` is a valid AARE char, add it to the regexes that match the AARE.
Also add some tests to ensure this is really fixed, and make the error
output of the tests more useful/verbose.
Note: One of the added tests (with a space in the peer name) uncovered a
bug in quote handling. This will be fixed in the next commit.
Fixes: https://gitlab.com/apparmor/apparmor/-/issues/404
