feat(events-targets): allow all ECS TaskOverrides (#32344)

### Issue #32217

Closes #32217.

### Reason for this change

ECS targets can override any item in the [`TaskOverride` structure](https://docs.aws.amazon.com/AmazonECS/latest/APIReference/API_TaskOverride.html) via the `input` parameter, according to [the docs](https://docs.aws.amazon.com/eventbridge/latest/userguide/eb-targets.html#targets-specifics-ecs-task).

However, today, only the `containerOverrides` option is exposed: https://github.com/aws/aws-cdk/blob/1b7265bf5cc623b2e362266c96ce866df539581f/packages/aws-cdk-lib/aws-events-targets/lib/ecs-task.ts#L225-L227

### Description of changes

This PR adds all `TaskOverride` properties to the `input` parameter.

### Description of how you validated changes

I add unit tests. I also updated the existing integration tests to include additional overrides. I validated them in my AWS account.

### 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: blimmer

packages/@aws-cdk-testing/framework-integ/test/aws-events-targets/test/ecs/integ.event-ec2-task.js.snapshot/EcsTestDefaultTestDeployAssert8B2741C4.assets.json

@@ -1028,7 +1028,7 @@
        }
       },
       "Id": "Target0",
-      "Input": "{\"containerOverrides\":[{\"name\":\"TheContainer\",\"environment\":[{\"name\":\"I_WAS_TRIGGERED\",\"value\":\"From CloudWatch Events\"}]}]}",
+      "Input": "{\"containerOverrides\":[{\"name\":\"TheContainer\",\"environment\":[{\"name\":\"I_WAS_TRIGGERED\",\"value\":\"From CloudWatch Events\"}]}],\"cpu\":\"512\",\"memory\":\"512\"}",
       "RoleArn": {
        "Fn::GetAtt": [
         "TaskDefEventsRoleFB3B67B8",
@@ -1078,4 +1078,4 @@
    ]
   }
  }
-}
+}

packages/@aws-cdk-testing/framework-integ/test/aws-events-targets/test/ecs/integ.event-ec2-task.js.snapshot/aws-ecs-integ-ecs.assets.json

@@ -43,6 +43,8 @@ rule.addTarget(new targets.EcsTask({
   cluster,
   taskDefinition,
   taskCount: 1,
+  cpu: '512',
+  memory: '512',
   containerOverrides: [{
     containerName: 'TheContainer',
     environment: [