chore(codegen): replace getErrors() with getErrorsSet()

Author: trivikr

codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AwsProtocolUtils.java

@@ -293,7 +293,7 @@ static Map<String, TreeSet<String>> getErrorAliases(GenerationContext context,
         boolean awsQueryCompatible = service.hasTrait(AwsQueryCompatibleTrait.class);
         if (awsQueryCompatible) {
             for (OperationShape operation : operations) {
-                List<ShapeId> errors = operation.getErrors();
+                Set<ShapeId> errors = operation.getErrorsSet();
                 for (ShapeId error : errors) {
                     Shape errorShape = context.getModel().expectShape(error);
                     if (errorShape.hasTrait(AwsQueryErrorTrait.class)) {

codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AwsQuery.java

@@ -215,7 +215,7 @@ public void generateProtocolTests(GenerationContext context) {
     public Map<String, ShapeId> getOperationErrors(GenerationContext context, OperationShape operation) {
         Map<String, ShapeId> errors = new TreeMap<>();
 
-        operation.getErrors().forEach(shapeId -> {
+        operation.getErrorsSet().forEach(shapeId -> {
             Shape errorShape = context.getModel().expectShape(shapeId);
             String errorName = shapeId.getName(context.getService());