SONARPY-3238 Rule S7613: Fix FP when return statement is outside of lambda (#430)

GitOrigin-RevId: a0fa3ec2b6a624fd5363b4b0347171aed860b7b0

Author: joke1196

python-checks/src/main/java/org/sonar/python/checks/AwsLambdaReturnValueAreSerializableCheck.java

@@ -120,7 +120,7 @@ private void checkReturnStatement(SubscriptionContext ctx) {
     }
 
     FunctionDef function = (FunctionDef) parentFunction;
-    if (!AwsLambdaChecksUtils.isLambdaHandler(ctx, function)) {
+    if (!AwsLambdaChecksUtils.isOnlyLambdaHandler(ctx, function)) {
       return;
     }
 

python-checks/src/test/resources/checks/awslambdaReturnValueAreSerializable.py

@@ -161,6 +161,16 @@ def complex_compliant_lambda_handler(event, context):
         },
     }
 
+@dataclasses.dataclass
+class OrderOutput:
+  id: int
+  
+def process():
+  return OrderOutput(1) # Compliant the value is not returned
+
+def no_return_lambda_handler(event, ctx):
+  order_output = process()
+  return {1,2} # Noncompliant
 
 # Non-Lambda functions (should not trigger the rule)
 def regular_function_set():