Preserve prefix when moving from new to builder (#5130)

Previously, this

SendMessageRequest sendMessage = new SendMessageRequest();

is getting transformed to this (o space after =)

SendMessageRequest sendMessage =SendMessageRequest.builder().build();

Author: dagnir

migration-tool/src/main/java/software/amazon/awssdk/migration/internal/recipe/NewV1ClassToBuilder.java

@@ -150,7 +150,7 @@ public J visitNewClass(J.NewClass newClass, ExecutionContext executionContext) {
 
             J.MethodInvocation buildInvoke = new J.MethodInvocation(
                 Tree.randomId(),
-                Space.EMPTY,
+                newClass.getPrefix(),
                 Markers.EMPTY,
                 JRightPadded.build(builderInvoke),
                 null,

migration-tool/src/test/java/software/amazon/awssdk/migration/recipe/NewV1ModelClassToV2Test.java

@@ -150,4 +150,29 @@ public void request_returnedFromMethod_isRewritten() {
             )
         );
     }
+
+    @Test
+    @EnabledOnJre({JRE.JAVA_8})
+    public void request_assignedToVariable_newOnly_isRewritten() {
+        rewriteRun(
+            java(
+                "import com.amazonaws.services.sqs.AmazonSQS;\n"
+                + "import com.amazonaws.services.sqs.model.SendMessageRequest;\n"
+                + "\n"
+                + "public class SqsExample {\n"
+                + "    public static void main(String[] args) {\n"
+                + "        SendMessageRequest sendMessage = new SendMessageRequest();\n"
+                + "    }\n"
+                + "}\n",
+                "import com.amazonaws.services.sqs.AmazonSQS;\n"
+                + "import com.amazonaws.services.sqs.model.SendMessageRequest;\n"
+                + "\n"
+                + "public class SqsExample {\n"
+                + "    public static void main(String[] args) {\n"
+                + "        SendMessageRequest sendMessage = SendMessageRequest.builder().build();\n"
+                + "    }\n"
+                + "}"
+            )
+        );
+    }
 }