fix(ecs-patterns): integ test unable to create ECS service (#29490)

### Issue # (if applicable)

part of #29186 (comment)
same as #29333

### Reason for this change


CFN stack gets stuck after `yarn integ` because of not being able to create ECS service.

```
AWS::ECS::Service | CREATE_IN_PROGRESS
```

```
$ aws ecs describe-tasks --cluster aws-ecs-integ-lb-fargate-cmd-entrypoint-xxx --tasks xxxxxxxxxxxxxxx | jq '.tasks[].stopCode'
"EssentialContainerExited"
```

### Description of changes


Change `taskImageOptions` `image`, `command`, `entryPoint` and add security group.
Ref: https://docs.aws.amazon.com/AmazonECS/latest/developerguide/example_task_definitions.html#example_task_definition-webserver

### Description of how you validated changes


Pass integration tests

### 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)

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

Author: wafuwafu13