Fix memory leaks & data races in tests (#4772)

* Add a few pre-made sanitizer suppressions

* Test Sanitization: Fix threading issues

* Test Sanitization: Allow deletion of PubSub

We still don't delete it in main code, but this allows us to try
deleting it in tests.

* Test Sanitization: Fix some memory leaks

* fix gtest clang-tidy warning

* const emojis test :-)

src/providers/twitch/pubsubmessages/AutoMod.hpp

@@ -31,7 +31,8 @@ struct PubSubAutoModQueueMessage {
     QString senderUserDisplayName;
     QColor senderUserChatColor;
 
-    PubSubAutoModQueueMessage(const QJsonObject &root);
+    PubSubAutoModQueueMessage() = default;
+    explicit PubSubAutoModQueueMessage(const QJsonObject &root);
 };
 
 }  // namespace chatterino