feat(stepfunction): add enableExecuteCommand to sfn ECSRunTask (#29638)

### Issue #29637

Closes #29637

### Reason for this change
Allow setting the enableExecuteCommand for ECSRunTask in sfn

### Description of changes
Add the enableExecuteCommand property to the EcsRunTaskProps, to start the task from step functions with execution command enabled.

### Description of how you validated changes
Unit-test added. Existing ones passed.

### 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: matthiasgubler

packages/@aws-cdk-testing/framework-integ/test/aws-stepfunctions-tasks/test/ecs/integ.ec2-run-task.js.snapshot/aws-sfn-tasks-ecs-run-task.assets.json

@@ -1379,7 +1379,7 @@
          "Arn"
         ]
        },
-       "\",\"TaskDefinition\":\"awssfntasksecsruntaskTaskDef75140181\",\"Overrides\":{\"ContainerOverrides\":[{\"Name\":\"Container\",\"Environment\":[{\"Name\":\"SOME_KEY\",\"Value.$\":\"$.SomeKey\"}]}]},\"LaunchType\":\"EC2\"}}}}"
+       "\",\"TaskDefinition\":\"awssfntasksecsruntaskTaskDef75140181\",\"Overrides\":{\"ContainerOverrides\":[{\"Name\":\"Container\",\"Environment\":[{\"Name\":\"SOME_KEY\",\"Value.$\":\"$.SomeKey\"}]}]},\"LaunchType\":\"EC2\",\"EnableExecuteCommand\":true}}}}"
       ]
      ]
     },