Fix several issues with IAM trait classes

This commit foremost fixes an issue where the toNode method on ActionResources
does not function properly, omitting all values instead.

It also updates several type signatures for SmithyBuilder generic type responses
to use the specific implementation of the interface.

It also includes an simplification of the createNode method for the
defineConditionKeys trait.

smithy-aws-iam-traits/src/main/java/software/amazon/smithy/aws/iam/traits/ActionResource.java

@@ -60,7 +60,7 @@ public Node toNode() {
     }
 
     @Override
-    public SmithyBuilder<ActionResource> toBuilder() {
+    public Builder toBuilder() {
         return builder().conditionKeys(conditionKeys);
     }
 

smithy-aws-iam-traits/src/main/java/software/amazon/smithy/aws/iam/traits/ActionResources.java

@@ -79,18 +79,20 @@ public Node toNode() {
             for (Map.Entry<String, ActionResource> requiredEntry : required.entrySet()) {
                 requiredBuilder.withMember(requiredEntry.getKey(), requiredEntry.getValue().toNode());
             }
+            builder.withMember(REQUIRED, requiredBuilder.build());
         }
         if (!optional.isEmpty()) {
             ObjectNode.Builder optionalBuilder = Node.objectNodeBuilder();
             for (Map.Entry<String, ActionResource> optionalEntry : optional.entrySet()) {
                 optionalBuilder.withMember(optionalEntry.getKey(), optionalEntry.getValue().toNode());
             }
+            builder.withMember(OPTIONAL, optionalBuilder.build());
         }
         return builder.build();
     }
 
     @Override
-    public SmithyBuilder<ActionResources> toBuilder() {
+    public Builder toBuilder() {
         return builder().required(required).optional(optional);
     }
 

smithy-aws-iam-traits/src/main/java/software/amazon/smithy/aws/iam/traits/ConditionKeyDefinition.java

@@ -108,7 +108,7 @@ public boolean isRequired() {
     }
 
     @Override
-    public SmithyBuilder<ConditionKeyDefinition> toBuilder() {
+    public Builder toBuilder() {
         return builder()
                 .documentation(documentation)
                 .externalDocumentation(externalDocumentation)

smithy-aws-iam-traits/src/main/java/software/amazon/smithy/aws/iam/traits/DefineConditionKeysTrait.java

@@ -15,7 +15,6 @@
 
 package software.amazon.smithy.aws.iam.traits;
 
-import java.util.AbstractMap;
 import java.util.HashMap;
 import java.util.Map;
 import java.util.Optional;
@@ -78,19 +77,19 @@ public Map<String, ConditionKeyDefinition> getConditionKeys() {
      * Get a specific condition key by name.
      *
      * @param name Name of the condition key to get.
-     * @return Returns the optionall found condition key.
+     * @return Returns the optionally found condition key.
      */
     public Optional<ConditionKeyDefinition> getConditionKey(String name) {
         return Optional.ofNullable(conditionKeys.get(name));
     }
 
     @Override
     protected Node createNode() {
-        return conditionKeys.entrySet().stream()
-                .map(entry -> new AbstractMap.SimpleImmutableEntry<>(
-                        Node.from(entry.getKey()), entry.getValue().toNode()))
-                .collect(ObjectNode.collect(Map.Entry::getKey, Map.Entry::getValue))
-                .toBuilder().sourceLocation(getSourceLocation()).build();
+        ObjectNode.Builder builder = ObjectNode.builder().sourceLocation(getSourceLocation());
+        for (Map.Entry<String, ConditionKeyDefinition> entry : conditionKeys.entrySet()) {
+            builder.withMember(entry.getKey(), entry.getValue().toNode());
+        }
+        return builder.build();
     }
 
     @Override

smithy-aws-iam-traits/src/main/java/software/amazon/smithy/aws/iam/traits/IamActionTrait.java

@@ -28,7 +28,6 @@
 import software.amazon.smithy.utils.BuilderRef;
 import software.amazon.smithy.utils.FunctionalUtils;
 import software.amazon.smithy.utils.ListUtils;
-import software.amazon.smithy.utils.SmithyBuilder;
 import software.amazon.smithy.utils.ToSmithyBuilder;
 
 /**
@@ -191,7 +190,7 @@ protected Node createNode() {
     }
 
     @Override
-    public SmithyBuilder<IamActionTrait> toBuilder() {
+    public Builder toBuilder() {
         return builder().sourceLocation(getSourceLocation()).name(name);
     }
 

smithy-aws-iam-traits/src/main/java/software/amazon/smithy/aws/iam/traits/IamResourceTrait.java

@@ -23,7 +23,6 @@
 import software.amazon.smithy.model.traits.AbstractTrait;
 import software.amazon.smithy.model.traits.AbstractTraitBuilder;
 import software.amazon.smithy.model.traits.Trait;
-import software.amazon.smithy.utils.SmithyBuilder;
 import software.amazon.smithy.utils.ToSmithyBuilder;
 
 /**
@@ -106,7 +105,7 @@ protected Node createNode() {
     }
 
     @Override
-    public SmithyBuilder<IamResourceTrait> toBuilder() {
+    public Builder toBuilder() {
         return builder().sourceLocation(getSourceLocation()).name(name);
     }