fix(ecs): deployment alarm configurations are being added in isolated partitions (#26458)

Fixes #26456. 

Renames the isolated partitions to their correct names. 

----

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

Author: bvtujo

packages/aws-cdk-lib/aws-ecs/lib/base/base-service.ts

@@ -1367,7 +1367,7 @@ export abstract class BaseService extends Resource
   }
 
   private deploymentAlarmsAvailableInRegion(): boolean {
-    const unsupportedPartitions = ['aws-cn', 'aws-us-gov', 'aws-us-iso', 'aws-us-iso-b'];
+    const unsupportedPartitions = ['aws-cn', 'aws-us-gov', 'aws-iso', 'aws-iso-b'];
     const currentRegion = RegionInfo.get(this.stack.resolve(this.stack.region));
     if (currentRegion.partition) {
       return !unsupportedPartitions.includes(currentRegion.partition);

packages/aws-cdk-lib/aws-ecs/test/ec2/ec2-service.test.ts

@@ -2365,6 +2365,32 @@ describe('ec2 service', () => {
         });
       });
 
+      test('no deployment alarms in isolated partitions', () => {
+        const app = new cdk.App();
+        const govCloudStack = new cdk.Stack(app, 'IsoStack', {
+          env: { region: 'us-isob-east-1' },
+        });
+        const vpc = new ec2.Vpc(govCloudStack, 'MyVpc', {});
+        const gcCluster = new ecs.Cluster(govCloudStack, 'EcsCluster', { vpc });
+        addDefaultCapacityProvider(gcCluster, govCloudStack, vpc);
+        const gcTaskDefinition = new ecs.Ec2TaskDefinition(govCloudStack, 'Ec2TaskDef');
+
+        gcTaskDefinition.addContainer('web', {
+          image: ecs.ContainerImage.fromRegistry('amazon/amazon-ecs-sample'),
+          memoryLimitMiB: 512,
+        });
+        new ecs.Ec2Service(govCloudStack, 'Ec2Service', {
+          cluster: gcCluster,
+          taskDefinition: gcTaskDefinition,
+        });
+
+        Template.fromStack(govCloudStack).hasResourceProperties('AWS::ECS::Service', {
+          DeploymentConfiguration: {
+            Alarms: Match.absent(),
+          },
+        });
+      });
+
       /**
        * This section of tests test all combinations of the following possible
        * alarm names and metrics. Most combinations work just fine, some