Expose entity parameter in client.inline_query

Some bots, such as @gamee, use this to determine the type of results
to return (and "disable" themselves in channels).

telethon/tl/custom/inlineresult.py

@@ -25,10 +25,11 @@ class InlineResult:
     CONTACT = 'contact'
     GAME = 'game'
 
-    def __init__(self, client, original, query_id=None):
+    def __init__(self, client, original, query_id=None, *, entity=None):
         self._client = client
         self.result = original
         self._query_id = query_id
+        self._entity = entity
 
     @property
     def type(self):
@@ -97,7 +98,7 @@ class InlineResult:
         elif isinstance(self.result, types.BotInlineMediaResult):
             return self.result.document
 
-    async def click(self, entity, reply_to=None,
+    async def click(self, entity=None, reply_to=None,
                     silent=False, clear_draft=False, hide_via=False):
         """
         Clicks this result and sends the associated `message`.
@@ -123,7 +124,13 @@ class InlineResult:
                 Whether the "via @bot" should be hidden or not.
                 Only works with certain bots (like @bing or @gif).
         """
-        entity = await self._client.get_input_entity(entity)
+        if entity:
+            entity = await self._client.get_input_entity(entity)
+        elif self._entity:
+            entity = self._entity
+        else:
+            raise ValueError('You must provide the entity where the result should be sent to')
+
         reply_id = None if reply_to is None else utils.get_message_id(reply_to)
         req = functions.messages.SendInlineBotResultRequest(
             peer=entity,