Handle UIB interactions for ignoring channels. (#6503)

Co-authored-by: Michael Oliveira <34169552+Flame442@users.noreply.github.com>
Co-authored-by: Jakub Kuczys <me@jacken.men>

redbot/core/bot.py

@@ -819,6 +819,9 @@ class Red(
             Whether or not the message is eligible to be treated as a command.
         """
 
+        # NOTE: any changes to implementation here may need to be made
+        # in the `RedTree.interaction_check` as well
+
         channel = message.channel
         guild = message.guild
 
@@ -911,7 +914,18 @@ class Red(
             return True
 
         if isinstance(ctx.channel, discord.Thread):
-            channel = ctx.channel.parent
+            if isinstance(ctx, discord.Interaction) and ctx.is_user_integration():
+                ctx: discord.Interaction
+                # This is a user installed interaction, and thus... We're doomed!
+                # We must mock an object because we don't have the channel cached,
+                # and we are unable to fetch a full channel from the interaction
+                # #BlameDiscord, See Red#6501 for more details.
+
+                # LIMITATIONS: Due the fact that we don't know the categories either as they aren't...
+                # communicated in the interaction, we can't check for category ignores.
+                channel = discord.Object(id=ctx.channel.parent_id)
+            else:
+                channel = ctx.channel.parent
             thread = ctx.channel
         else:
             channel = ctx.channel