backfill @required on imagebuilder#LaunchTemplateConfiguration.SetDefaultVersion (#2838)

Author: lucix-aws

.changelog/139b04a8d6124cb29dfb9e66f9f70386.json

@@ -0,0 +1,8 @@
+{
+    "id": "139b04a8-d612-4cb2-9dfb-9e66f9f70386",
+    "type": "bugfix",
+    "description": "**BREAKING CHANGE**: The type of LaunchTemplateConfiguration.SetDefaultVersion has been changed from `bool` to `*bool`. Before this change, the field was incorrectly marked as having a default value of false by the service, which made it functionally impossible for users to express the full range of values for the field (true, false, and unset/nil), each of which have distinctly different behaviors.",
+    "modules": [
+        "service/imagebuilder"
+    ]
+}

codegen/smithy-aws-go-codegen/src/main/java/software/amazon/smithy/aws/go/codegen/customization/BackfillRequiredTrait.java

@@ -54,4 +54,4 @@ private static Map.Entry<ShapeId, Set<ShapeId>> serviceToShapeIds(String service
                 ShapeId.from(serviceId),
                 Arrays.stream(shapeIds).map(ShapeId::from).collect(toSet()));
     }
-}
+}

codegen/smithy-aws-go-codegen/src/main/java/software/amazon/smithy/aws/go/codegen/customization/RemoveDefaults.java

@@ -32,7 +32,11 @@ public class RemoveDefaults implements GoIntegration {
         serviceToShapeIds("com.amazonaws.paymentcryptographydata#PaymentCryptographyDataPlane",
                 "com.amazonaws.paymentcryptographydata#IntegerRangeBetween4And12"),
         serviceToShapeIds("com.amazonaws.emrserverless#AwsToledoWebService",
-                "com.amazonaws.emrserverless#WorkerCounts"));
+                "com.amazonaws.emrserverless#WorkerCounts"),
+        serviceToShapeIds("com.amazonaws.imagebuilder#imagebuilder",
+                    // https://github.com/aws/aws-sdk-go-v2/issues/2734
+                    // V1479153907
+                    "com.amazonaws.imagebuilder#LaunchTemplateConfiguration$setDefaultVersion"));
 
     private boolean mustPreprocess(ShapeId service) {
         return toRemove.containsKey(service);
@@ -95,4 +99,4 @@ private static Map.Entry<ShapeId, Set<ShapeId>> serviceToShapeIds(String service
                 ShapeId.from(serviceId),
                 Arrays.stream(shapeIds).map(ShapeId::from).collect(Collectors.toSet()));
     }
-}
+}