Changed the evaluated type of an in or not in operator to be `boo…

…l` if the LHS doesn't support containment. Previously, the expression evaluated to `Never`. This addresses #9327.

packages/pyright-internal/src/analyzer/operations.ts

@@ -1198,7 +1198,7 @@ function validateContainmentOperation(
                         deprecatedInfo = returnTypeResult.magicMethodDeprecationInfo;
                     }
 
-                    return returnTypeResult?.type;
+                    return returnTypeResult?.type ?? evaluator.getBuiltInObject(errorNode, 'bool');
                 }
             );
         }