[Enhancement]: Add vpc_id output of aws_elasticache_subnet_group data source

[posquit0]

Description

In #27114 , I requested a new data source aws_elasticache_subnet_group. And this data source was released in the release of https://github.com/hashicorp/terraform-provider-aws/blob/v4.36.0/CHANGELOG.md .

However, I needed aws_elasticache_subnet_group data source for vpc_id of a given ElastiCache subnet group.
The vpc_id can be used for creating a security group of the ElastiCache cluster like the below.

data "aws_elasticache_subnet_group" "this" {
  name = "default"
}

resource "aws_security_group" "this" {
  name        = "example"
  description = "Example Security Group."
  vpc_id      = data.aws_elasticache_subnet_group.this.vpc_id
}

Affected Resource(s) and/or Data Source(s)

• aws_elasticache_subnet_group

Potential Terraform Configuration

data "aws_elasticache_subnet_group" "this" {
  name = "default"
}

resource "aws_security_group" "this" {
  name        = "example"
  description = "Example Security Group."
  vpc_id      = data.aws_elasticache_subnet_group.this.vpc_id
}

References

> aws elasticache describe-cache-subnet-groups --cache-subnet-group-name default
{
    "CacheSubnetGroups": [
        {
            "CacheSubnetGroupName": "default",
            "CacheSubnetGroupDescription": "Default CacheSubnetGroup",
            "VpcId": "vpc-xxxxxxx",
            "Subnets": [
                {
                    "SubnetIdentifier": "subnet-aaaaaaa
                    "SubnetAvailabilityZone": {
                        "Name": "ap-northeast-2d"
                    }
                },
                {
                    "SubnetIdentifier": "subnet-bbbbbbb",
                    "SubnetAvailabilityZone": {
                        "Name": "ap-northeast-2a"
                    }
                },
                {
                    "SubnetIdentifier": "subnet-ccccccc",
                    "SubnetAvailabilityZone": {
                        "Name": "ap-northeast-2c"
                    }
                },
                {
                    "SubnetIdentifier": "subnet-ddddddd",
                    "SubnetAvailabilityZone": {
                        "Name": "ap-northeast-2b"
                    }
                }
            ],
            "ARN": "arn:aws:elasticache:ap-northeast-2:xxxxxxx:subnetgroup:default"
        }
    ]
}

Would you like to implement a fix?

No response

[github-actions]

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[github-actions]

This functionality has been released in v5.38.0 of the Terraform AWS Provider. Please see the Terraform documentation on provider versioning or reach out if you need any assistance upgrading.

For further feature requests or bug reports with this functionality, please create a new GitHub issue following the template. Thank you!

[github-actions]

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