chore(ecs-patterns): fix ec2/multiple-application-load-balanced-ecs-s…

…ervice integration test (#32524)

### Issue # (if applicable)

Relate #32506

### Reason for this change


This test is failing. Please try this quick check
```bash
docker run -d -p 80:80 -p 90:90 amazon/amazon-ecs-sample:latest

# Success
curl http://localhost:80

# Fail
curl http://localhost:90
```

### Description of changes


- Modify ECS task to also expose port 90
- Migrate to LaunchTemplate as LaunchConfiguration cannot be used on new account

### Description of how you validated changes


`yarn integ test/aws-ecs-patterns/test/ec2/integ.multiple-application-load-balanced-ecs-service.js`

### 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*