feat: new resource - TransitGatewayVPCAttachment (#251)

Issue [#1865](aws-controllers-k8s/community#1865)

Description of changes:
With these changes we are supporting TransitGatewayVPCAttachment resources.
This resource can reference TrasitGatewayID, VPCID, and SubnetID by their resource 
name. Also adding e2e tests.

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

Author: michaelhtm

apis/v1alpha1/ack-generate-metadata.yaml

@@ -1,13 +1,13 @@
 ack_generate_info:
-  build_date: "2025-03-25T22:26:20Z"
+  build_date: "2025-03-28T15:21:59Z"
   build_hash: 3722729cebe6d3c03c7e442655ef0846f91566a2
   go_version: go1.24.0
   version: v0.43.2-7-g3722729
-api_directory_checksum: b31faecf6092fab9677498f3624e624fee4cbaed
+api_directory_checksum: bb3f7a9b3924fdbe63a4082a9134b3f1f653979b
 api_version: v1alpha1
 aws_sdk_go_version: v1.32.6
 generator_config_info:
-  file_checksum: 33b2c8e790a68bd28b5efe9faa3b8e5fb980d1f4
+  file_checksum: 34c308f1552184ca33451041fd787bfd9d32dc5e
   original_file_name: generator.yaml
 last_modification:
   reason: API generation

apis/v1alpha1/generator.yaml

@@ -46,6 +46,8 @@ ignore:
     - CreateSubnetInput.Ipv6NetmaskLength
     - CreateSubnetInput.TagSpecifications
     - CreateSubnetOutput.Subnet.BlockPublicAccessStates
+    - CreateTransitGatewayVpcAttachmentInput.DryRun
+    - CreateTransitGatewayVpcAttachmentInput.TagSpecifications
     - CreateTransitGatewayInput.DryRun
     - CreateTransitGatewayInput.Options.SecurityGroupReferencingSupport
     - CreateTransitGatewayInput.TagSpecifications
@@ -181,7 +183,7 @@ ignore:
     - TransitGatewayRouteTable
     - TransitGatewayRoute
     - TransitGatewayRouteTableAnnouncement
-    - TransitGatewayVpcAttachment
+    # - TransitGatewayVpcAttachment
     #- TransitGateway
     - VerifiedAccessEndpoint
     - VerifiedAccessGroup
@@ -279,6 +281,8 @@ operations:
     operation_type:
       - Update
     resource_name: VpcPeeringConnection
+  DescribeTransitGatewayVpcAttachments:
+    custom_check_required_fields_missing_method: checkForMissingRequiredFields
 resources:
   CapacityReservation:
     fields:
@@ -799,6 +803,52 @@ resources:
         template_path: hooks/transit_gateway/sdk_file_end.go.tpl
     update_operation:
       custom_method_name: customUpdateTransitGateway
+  TransitGatewayVpcAttachment:
+    renames:
+      operations:
+        CreateTransitGatewayVpcAttachment:
+          output_fields:
+            TransitGatewayAttachmentId: ID
+        DescribeTransitGatewayVpcAttachments:
+          input_fields:
+            TransitGatewayAttachmentIds: ID
+          output_fields:
+            TransitGatewayAttachmentId: ID
+        ModifyTransitGatewayVpcAttachment:
+          input_fields:
+            TransitGatewayAttachmentId: ID
+        DeleteTransitGatewayVpcAttachment:
+          input_fields:
+            TransitGatewayAttachmentId: ID
+    fields:
+      Tags:
+        from:
+          operation: CreateTags
+          path: Tags
+      SubnetIds:
+        references:
+          resource: Subnet
+          path: Status.SubnetID
+      VpcId:
+        references:
+          resource: VPC
+          path: Status.VPCID
+      TransitGatewayId:
+        references:
+          resource: TransitGateway
+          path: Status.TransitGatewayID
+      ID:
+        is_primary_key: true
+        print:
+          path: Status.ID
+          name: ID
+    hooks:
+      sdk_create_post_build_request:
+        template_path: hooks/transit_gateway_vpc_attachment/sdk_create_post_build_request.go.tpl
+      sdk_update_pre_build_request:
+        template_path: hooks/transit_gateway_vpc_attachment/sdk_update_pre_build_request.go.tpl
+      sdk_update_post_build_request:
+        template_path: hooks/transit_gateway_vpc_attachment/sdk_update_post_build_request.go.tpl
   Vpc:
     update_operation:
       custom_method_name: customUpdateVPC