feat(ec2): backfill missing enums for ec2 (#33821)

### Description of changes

feat(ec2): backfill missing enums for ec2

Ref CFN docs:
https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-ec2-vpc.html#cfn-ec2-vpc-instancetenancy
https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-ec2-vpcendpoint.html#cfn-ec2-vpcendpoint-vpcendpointtype


### Checklist
- [ ] My code adheres to the [CONTRIBUTING GUIDE](https://github.com/aws/aws-cdk/blob/main/CONTRIBUTING.md) and [DESIGN GUIDELINES](https://github.com/aws/aws-cdk/blob/main/docs/DESIGN_GUIDELINES.md)

----

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

Author: xazhao

packages/aws-cdk-lib/aws-ec2/lib/vpc-endpoint.ts

@@ -75,6 +75,25 @@ export enum VpcEndpointType {
    * your route table, used for traffic destined to a supported AWS service.
    */
   GATEWAY = 'Gateway',
+
+  /**
+   * A Gateway Load Balancer (GWLB) endpoint is an entry/exit point in your VPC that allows traffic
+   * to flow between your VPC and Gateway Load Balancer appliances (like firewalls, intrusion detection systems,
+   * or other security appliances) deployed in a separate VPC.
+   */
+  GATEWAYLOADBALANCER = 'GatewayLoadBalancer',
+
+  /**
+   * A ServiceNetwork VPC endpoint is a feature to connect your VPC to an AWS Cloud WAN (Wide Area Network)
+   * or Amazon VPC Lattice service.
+   */
+  SERVICENETWORK = 'ServiceNetwork',
+
+  /**
+   * A Resource VPC endpoint in AWS is specifically designed to connect to AWS Resource Access Manager (RAM) service
+   * privately within your VPC, without requiring access through the public internet.
+   */
+  RESOURCE = 'Resource',
 }
 
 /**

packages/aws-cdk-lib/aws-ec2/lib/vpc.ts

@@ -1150,6 +1150,12 @@ export enum DefaultInstanceTenancy {
    * Any instance launched into the VPC automatically has dedicated tenancy, unless you launch it with the default tenancy.
    */
   DEDICATED = 'dedicated',
+
+  /**
+   * Instances must be launched on dedicated hosts. This provides additional visibility
+   * and control over instance placement at the physical host level.
+   */
+  HOST = 'host',
 }
 
 /**