[Core] Multiple mod admin roles (#2783)

* Adds Schema versioning
  - Adds Migration tool
  - Adds tool to migrate to allow multiple admin and mod roles
  - Supports Multiple mod and admin roles

* Ensures migration is run prior to cog load and connection to discord

* Updates to not rely on singular mod/admin role id

* Update requires logic for multiple mod/admin roles

* Add new commands for managing mod/admin roles

* Feedback

Update strings
Update docstrings
Add aliases

* Use snowflakelist

* paginate

* Change variable name

* Fix mistake

* handle settings view fix

* Fix name error

* I'm bad at Ux

* style fix

redbot/cogs/bank/bank.py

@@ -43,10 +43,14 @@ def check_global_setting_admin():
                 return False
             if await ctx.bot.is_owner(author):
                 return True
-            permissions = ctx.channel.permissions_for(author)
-            is_guild_owner = author == ctx.guild.owner
-            admin_role = await ctx.bot.db.guild(ctx.guild).admin_role()
-            return admin_role in author.roles or is_guild_owner or permissions.manage_guild
+            if author == ctx.guild.owner:
+                return True
+            if ctx.channel.permissions_for(author).manage_guild:
+                return True
+            admin_roles = set(await ctx.bot.db.guild(ctx.guild).admin_role())
+            for role in author.roles:
+                if role.id in admin_roles:
+                    return True
         else:
             return await ctx.bot.is_owner(author)