Apply an IP range blacklist to push and key revocation requests. (#8821)

Replaces the `federation_ip_range_blacklist` configuration setting with an
`ip_range_blacklist` setting with wider scope. It now applies to:

* Federation
* Identity servers
* Push notifications
* Checking key validitity for third-party invite events

The old `federation_ip_range_blacklist` setting is still honored if present, but
with reduced scope (it only applies to federation and identity servers).

tests/storage/test_redaction.py

@@ -34,7 +34,7 @@ class RedactionTestCase(unittest.HomeserverTestCase):
         config = self.default_config()
         config["redaction_retention_period"] = "30d"
         return self.setup_test_homeserver(
-            resource_for_federation=Mock(), http_client=None, config=config
+            resource_for_federation=Mock(), federation_http_client=None, config=config
         )
 
     def prepare(self, reactor, clock, hs):