[Enhancement]: Add vpc_id output of aws_elasticache_subnet_group data source

[Jebaseelanravi]

Description

vpc_id attr is missing in aws_elasticache_subnet_group data source.
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
}

Relations

Closes #27398

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"
        }
    ]
}

Output from Acceptance Testing

[github-actions]

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[ewbankkit]

LGTM 🚀.

% make testacc TESTARGS='-run=TestAccElastiCacheSubnetGroupDataSource_\|TestAccElastiCacheSubnetGroup_' PKG=elasticache ACCTEST_PARALLELISM=3
==> Checking that code complies with gofmt requirements...
TF_ACC=1 go test ./internal/service/elasticache/... -v -count 1 -parallel 3  -run=TestAccElastiCacheSubnetGroupDataSource_\|TestAccElastiCacheSubnetGroup_ -timeout 360m
=== RUN   TestAccElastiCacheSubnetGroupDataSource_basic
=== PAUSE TestAccElastiCacheSubnetGroupDataSource_basic
=== RUN   TestAccElastiCacheSubnetGroup_basic
=== PAUSE TestAccElastiCacheSubnetGroup_basic
=== RUN   TestAccElastiCacheSubnetGroup_disappears
=== PAUSE TestAccElastiCacheSubnetGroup_disappears
=== RUN   TestAccElastiCacheSubnetGroup_tags
=== PAUSE TestAccElastiCacheSubnetGroup_tags
=== RUN   TestAccElastiCacheSubnetGroup_update
=== PAUSE TestAccElastiCacheSubnetGroup_update
=== CONT  TestAccElastiCacheSubnetGroupDataSource_basic
=== CONT  TestAccElastiCacheSubnetGroup_tags
=== CONT  TestAccElastiCacheSubnetGroup_update
--- PASS: TestAccElastiCacheSubnetGroupDataSource_basic (38.00s)
=== CONT  TestAccElastiCacheSubnetGroup_disappears
--- PASS: TestAccElastiCacheSubnetGroup_update (63.62s)
=== CONT  TestAccElastiCacheSubnetGroup_basic
--- PASS: TestAccElastiCacheSubnetGroup_disappears (27.49s)
--- PASS: TestAccElastiCacheSubnetGroup_tags (80.22s)
--- PASS: TestAccElastiCacheSubnetGroup_basic (28.00s)
PASS
ok  	github.com/hashicorp/terraform-provider-aws/internal/service/elasticache	103.309s

[ewbankkit]

@Jebaseelanravi Thanks for the contribution 🎉 👏.
I also added the vpc_id attribute to the corresponding resource.

[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]

I'm going to lock this pull request because it has been closed for 30 days ⏳. This helps our maintainers find and focus on the active issues.
If you have found a problem that seems related to this change, please open a new issue and complete the issue template so we can capture all the details necessary to investigate further.