ec2: setting placement group name does not work

### Describe the bug

Unable to manually set/change the name of a placement group using with the [L1](https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_ec2.CfnPlacementGroup.html#attrgroupname) or [L2](https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_ec2.PlacementGroup.html#placementgroupname-1) construct

### Expected Behavior

As the the feature is documented, the expectation is to able to manually set a placement group name

### Current Behavior

The CDK will auto-generate a name for the placement group regardless if you is manually set

### Reproduction Steps

```
import { Duration, Stack, StackProps } from 'aws-cdk-lib';
import * as ec2 from 'aws-cdk-lib/aws-ec2';
import { Construct } from 'constructs';

export class PlacementStack extends Stack {
constructor(scope: Construct, id: string, props?: StackProps) {
super(scope, id, props);

const placem = new ec2.PlacementGroup(this, 'MyPlacementGroup', /* all optional props */ {
partitions: 1,
placementGroupName: 'Testing2341413',
// spreadLevel: ec2.PlacementGroupSpreadLevel.HOST,
strategy: ec2.PlacementGroupStrategy.PARTITION,
});
}
}

```

### Possible Solution

_No response_

### Additional Information/Context

The underlying [CFN placement group](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-ec2-placementgroup.html) resource has no support for the placement group name property. Since the CDK is a wrapper for the CFN, there may be some back end integration that is not working as expected

### CDK CLI Version

2.108.1 (build 2320255)

### Framework Version

_No response_

### Node.js Version

v18.17.1

### OS

n/a

### Language

TypeScript

### Language Version

_No response_

### Other information

_No response_

Start with the aws_ec2.PlacementGroup and CfnPlacementGroup constructs referenced in the reproduction, then compare their documented placementGroupName behavior with the linked CloudFormation placement-group resource. Reproduce the TypeScript example and determine whether the expected name can be supported or whether the documentation and behavior need alignment; done means the documented behavior is accurate and covered by an appropriate test.

Written by the indexing model from the issue text.