feat(ec2): add m5n and m5dn instance types (#17488)

Adding missing EC2 instances types `m5n` and `m5dn`

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

@@ -68,6 +68,26 @@ export enum InstanceClass {
    */
   M5AD = 'm5ad',
 
+  /**
+   * Standard instances for high performance computing, 5th generation
+   */
+  STANDARD5_HIGH_PERFORMANCE = 'm5n',
+
+  /**
+   * Standard instances for high performance computing, 5th generation
+   */
+  M5N = 'm5n',
+
+  /**
+   * Standard instances with local NVME drive for high performance computing, 5th generation
+   */
+  STANDARD5_NVME_DRIVE_HIGH_PERFORMANCE = 'm5dn',
+
+  /**
+   * Standard instances with local NVME drive for high performance computing, 5th generation
+   */
+  M5DN = 'm5dn',
+
   /**
    * Memory optimized instances, 3rd generation
    */