Python: Update test cases

Adds a comment explaining why we no longer flag the indirect tuple
example.
Also adds a test case which _would_ be flagged if not for the type
annotation.

python/ql/test/query-tests/Functions/return_values/functions_test.py

@@ -321,7 +321,7 @@ def function_returning_2_tuple():
 def function_returning_3_tuple():
     return 1,2,3
 
-def indirectly_returning_different_tuple_sizes(x):
+def indirectly_returning_different_tuple_sizes(x): # OK, since we only look at local tuple returns
     if x:
         return function_returning_2_tuple()
     else:
@@ -347,3 +347,9 @@ def ok_match2(x):  # FP
             return 0
         case _:
             return 1
+
+def ok_tuple_returns_captured_in_type(x: bool) -> tuple[int, ...]: # OK because there is a type annotation present
+    if x:
+        return 1, 2
+    else:
+        return 1, 2, 3