service/ec2: Support Private NAT Gateways

[ewbankkit]

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This release adds a new optional parameter connectivityType (public, private) for the CreateNatGateway API. Private NatGateway does not require customers to attach an InternetGateway to the VPC and can be used for communication with other VPCs and on-premise networks.

Announcement.

Output from acceptance testing:

Commercial

% make testacc TEST=./aws TESTARGS='-run=TestAccAWSNatGateway_\|TestAccDataSourceAwsNatGateway_'
==> Checking that code complies with gofmt requirements...
TF_ACC=1 go test ./aws -v -count 1 -parallel 20 -run=TestAccAWSNatGateway_\|TestAccDataSourceAwsNatGateway_ -timeout 180m
=== RUN   TestAccDataSourceAwsNatGateway_basic
=== PAUSE TestAccDataSourceAwsNatGateway_basic
=== RUN   TestAccAWSNatGateway_basic
=== PAUSE TestAccAWSNatGateway_basic
=== RUN   TestAccAWSNatGateway_ConnectivityType_Private
=== PAUSE TestAccAWSNatGateway_ConnectivityType_Private
=== RUN   TestAccAWSNatGateway_tags
=== PAUSE TestAccAWSNatGateway_tags
=== CONT  TestAccDataSourceAwsNatGateway_basic
=== CONT  TestAccAWSNatGateway_tags
=== CONT  TestAccAWSNatGateway_ConnectivityType_Private
=== CONT  TestAccAWSNatGateway_basic
--- PASS: TestAccAWSNatGateway_ConnectivityType_Private (181.42s)
--- PASS: TestAccDataSourceAwsNatGateway_basic (187.93s)
--- PASS: TestAccAWSNatGateway_basic (218.63s)
--- PASS: TestAccAWSNatGateway_tags (263.67s)
PASS
ok  	github.com/terraform-providers/terraform-provider-aws/aws	266.733s

GovCloud

% make testacc TEST=./aws TESTARGS='-run=TestAccAWSNatGateway_\|TestAccDataSourceAwsNatGateway_'
==> Checking that code complies with gofmt requirements...
TF_ACC=1 go test ./aws -v -count 1 -parallel 20 -run=TestAccAWSNatGateway_\|TestAccDataSourceAwsNatGateway_ -timeout 180m
=== RUN   TestAccDataSourceAwsNatGateway_basic
=== PAUSE TestAccDataSourceAwsNatGateway_basic
=== RUN   TestAccAWSNatGateway_basic
=== PAUSE TestAccAWSNatGateway_basic
=== RUN   TestAccAWSNatGateway_ConnectivityType_Private
=== PAUSE TestAccAWSNatGateway_ConnectivityType_Private
=== RUN   TestAccAWSNatGateway_tags
=== PAUSE TestAccAWSNatGateway_tags
=== CONT  TestAccDataSourceAwsNatGateway_basic
=== CONT  TestAccAWSNatGateway_tags
=== CONT  TestAccAWSNatGateway_ConnectivityType_Private
=== CONT  TestAccAWSNatGateway_basic
--- PASS: TestAccDataSourceAwsNatGateway_basic (181.82s)
--- PASS: TestAccAWSNatGateway_ConnectivityType_Private (197.42s)
--- PASS: TestAccAWSNatGateway_basic (213.17s)
--- PASS: TestAccAWSNatGateway_tags (262.52s)
PASS
ok  	github.com/terraform-providers/terraform-provider-aws/aws	265.552s

[anGie44]

Small q, otherwise LGTM 🚀

[github-actions]

This functionality has been released in v3.45.0 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.