Begin work on a data request API (#4045)

[Core] Data Deletion And Disclosure APIs

 - Adds a Data Deletion API
   - Deletion comes in a few forms based on who is requesting
   - Deletion must be handled by 3rd party
 - Adds a Data Collection Disclosure Command
   - Provides a dynamically generated statement from 3rd party
   extensions
 - Modifies the always available commands to be cog compatible
   - Also prevents them from being unloaded accidentally

redbot/cogs/alias/__init__.py

@@ -4,5 +4,5 @@ from redbot.core.bot import Red
 
 async def setup(bot: Red):
     cog = Alias(bot)
-    await cog.initialize()
     bot.add_cog(cog)
+    cog.sync_init()