feat(ec2): flow logs from TransitGateway and TransitGatewayAttachment (…

…#28605)

I have enabled the configuration of flow logs for TransitGateway and TransitGatewayAttachment. 

Create flow logs from TransitGateway:
```ts
declare const tgw: ec2.CfnTransitGateway;

new ec2.FlowLog(this, 'TransitGatewayFlowLog', {
  resourceType: ec2.FlowLogResourceType.fromTransitGatewayId(tgw.ref)
})
```

Create flowlogs from TransitGatewayAttachment:
```ts
declare const tgwAttachment: ec2.CfnTransitGatewayAttachment;

new ec2.FlowLog(this, 'TransitGatewayAttachmentFlowLog', {
  resourceType: ec2.FlowLogResourceType.fromTransitGatewayAttachmentId(tgwAttachment.ref)
})
```

Since `trafficType` [cannot be set for flow logs related to TransitGateway resources](https://docs.aws.amazon.com/vpc/latest/tgw/working-with-flow-logs.html#flow-logs-api-cli), I have also added error handling for this.

```ts
if (props.resourceType.resourceType === 'TransitGateway' || props.resourceType.resourceType === 'TransitGatewayAttachment') {
      if (props.trafficType) {
        throw new Error('trafficType is not supported for Transit Gateway and Transit Gateway Attachment');
      }
      ...
    }
```

Closes #27222.

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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*