feat(ec2): support for c7i and r7iz instance types in aws-ec2 (#27611)

Support of C7i and R7iz EC2-Instance types in aws-ec2.

The [C7i](https://aws.amazon.com/ec2/instance-types/c7i/) and the [R7iz](https://aws.amazon.com/ec2/instance-types/r7iz/) instance types were introduced in September 2023.
Both instance types are confirmed to be supported in [AWS-Cloudformation](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-ec2-instance.html#cfn-ec2-instance-instancetype).

----

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

Author: kevntao

packages/aws-cdk-lib/aws-ec2/lib/instance-types.ts

@@ -326,6 +326,16 @@ export enum InstanceClass {
    */
   R7GD = 'r7gd',
 
+  /**
+   * Memory optimized instances based on Intel Xeon Scalable (Sapphire Rapids) processors, 7th generation
+   */
+  MEMORY7_INTEL = 'memory7-intel',
+
+  /**
+   * Memory optimized instances based on Intel Xeon Scalable (Sapphire Rapids) processors, 7th generation
+   */
+  R7IZ = 'r7iz',
+
   /**
    * Compute optimized instances, 3rd generation
    */
@@ -506,6 +516,16 @@ export enum InstanceClass {
    */
   C7GN = 'c7gn',
 
+  /**
+   * Compute optimized instances based on Intel Xeon Scalable (Sapphire Rapids) processors, 7th generation
+   */
+  COMPUTE7_INTEL = 'compute7-intel',
+
+  /**
+   * Compute optimized instances based on Intel Xeon Scalable (Sapphire Rapids) processors, 7th generation
+   */
+  C7I = 'c7i',
+
   /**
    * Storage-optimized instances, 2nd generation
    */
@@ -1221,6 +1241,8 @@ export class InstanceType {
       [InstanceClass.R7G]: 'r7g',
       [InstanceClass.MEMORY7_GRAVITON3_NVME_DRIVE]: 'r7gd',
       [InstanceClass.R7GD]: 'r7gd',
+      [InstanceClass.MEMORY7_INTEL]: 'r7iz',
+      [InstanceClass.R7IZ]: 'r7iz',
       [InstanceClass.COMPUTE3]: 'c3',
       [InstanceClass.C3]: 'c3',
       [InstanceClass.COMPUTE4]: 'c4',
@@ -1255,6 +1277,8 @@ export class InstanceType {
       [InstanceClass.C7GD]: 'c7gd',
       [InstanceClass.COMPUTE7_GRAVITON3_HIGH_NETWORK_BANDWIDTH]: 'c7gn',
       [InstanceClass.C7GN]: 'c7gn',
+      [InstanceClass.COMPUTE7_INTEL]: 'c7i',
+      [InstanceClass.C7I]: 'c7i',
       [InstanceClass.STORAGE2]: 'd2',
       [InstanceClass.D2]: 'd2',
       [InstanceClass.STORAGE3]: 'd3',