fix: add an operation in NotSame.smithy test model

Author: trivikr

codegen/smithy-aws-typescript-codegen/src/test/resources/software/amazon/smithy/aws/typescript/codegen/NotSame.smithy

@@ -6,4 +6,17 @@ use aws.protocols#restJson1
 @restJson1
 service OriginalName {
     version: "2019-10-15",
+    operations: [GetFoo]
 }
+
+operation GetFoo {
+    input: GetFooInput,
+    output: GetFooOutput,
+    errors: [GetFooError]
+}
+
+structure GetFooInput {}
+structure GetFooOutput {}
+
+@error("client")
+structure GetFooError {}