feat(stepfunctions-tasks): EmrCreateClusterOptions support ebsRootVolumeIops, ebsRootVolumeThroughput and managedScalingPolicy (#34677)

### Issue # (if applicable)

Closes #33431

### Reason for this change
Missing param in EmrCreateClusterOptions

### Description of changes
- EmrCreateClusterOptions support
  - ebsRootVolumeIops
  - ebsRootVolumeThroughput
  - managedScalingPolicy
- Move validations to private `validateProps` function

ManagedScalingPolicy.ScalingStrategy is supported by awscli/API, but not yet supported by Step Function. Therefore not included in this PR
![Screenshot 2025-06-10 222653](https://github.com/user-attachments/assets/0f2b8f9a-1806-4d69-8250-b14bd7c4d212)

### Describe any new or updated permissions being added
Add `iam:CreateServiceLinkedRole` permission for only EMR to create `AWSServiceRoleForEMRCleanup` as instructed by https://docs.aws.amazon.com/emr/latest/ManagementGuide/using-service-linked-roles-cleanup.html#create-service-linked-role

### Description of how you validated changes
Unit + Integ

### Checklist
- [x] My code adheres to the [CONTRIBUTING GUIDE](https://github.com/aws/aws-cdk/blob/main/CONTRIBUTING.md) and [DESIGN GUIDELINES](https://github.com/aws/aws-cdk/blob/main/docs/DESIGN_GUIDELINES.md)

----

*By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*

Author: phuhung273

packages/@aws-cdk-testing/framework-integ/test/aws-stepfunctions-tasks/test/emr/integ.emr-create-cluster-add-step-runtime-role.js.snapshot/EmrCreateClusterTestDefaultTestDeployAssert697DC891.assets.json

@@ -654,6 +654,35 @@
         }
        ]
       },
+      {
+       "Action": "iam:CreateServiceLinkedRole",
+       "Condition": {
+        "StringEquals": {
+         "iam:AWSServiceName": [
+          "elasticmapreduce.amazonaws.com",
+          "elasticmapreduce.amazonaws.com.cn"
+         ]
+        }
+       },
+       "Effect": "Allow",
+       "Resource": {
+        "Fn::Join": [
+         "",
+         [
+          "arn:",
+          {
+           "Ref": "AWS::Partition"
+          },
+          ":iam::",
+          {
+           "Ref": "AWS::AccountId"
+          },
+          ":role/aws-service-role/elasticmapreduce.amazonaws.com*/AWSServiceRoleForEMRCleanup*"
+         ]
+        ]
+       },
+       "Sid": "ElasticMapReduceServiceLinkedRole"
+      },
       {
        "Action": [
         "elasticmapreduce:AddJobFlowSteps",