force_basic_auth for default httpapi connection auth (#59193)

The default for a httpapi connection is to do basic auth, however
when setting the url_username and url_password without
force_basic_auth, the call to ansible.module_utils.open_url would
not always properly handle the basic auth headers based on the
combinations of **kwargs passed. This ensures that is always the
case when no session token exists and as the goal is to use basic
auth in the event of not having a session token, this should be
a safe operation.

Signed-off-by: Adam Miller <admiller@redhat.com>

lib/ansible/plugins/connection/httpapi.py

@@ -265,6 +265,7 @@ class Connection(NetworkConnectionBase):
             headers.update(self._auth)
             url_kwargs['headers'] = headers
         else:
+            url_kwargs['force_basic_auth'] = True
             url_kwargs['url_username'] = self.get_option('remote_user')
             url_kwargs['url_password'] = self.get_option('password')