chore(apprunner): AWS App Runner adds 7 new compute configurations (#25001)

I tried vCPU 0.25 and Mem 0.5 with CFn and it was supported.

- [AWS App Runner adds 7 new compute configurations](https://aws.amazon.com/about-aws/whats-new/2023/04/aws-app-runner-compute-configurations/)

----

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

Author: watany-dev

packages/@aws-cdk/aws-apprunner-alpha/lib/service.ts

@@ -29,6 +29,16 @@ export enum ImageRepositoryType {
  *
  */
 export class Cpu {
+  /**
+   * 0.25 vCPU
+   */
+  public static readonly QUARTER_VCPU = Cpu.of('0.25 vCPU');
+
+  /**
+   * 0.5 vCPU
+   */
+  public static readonly HALF_VCPU = Cpu.of('0.5 vCPU');
+
   /**
    * 1 vCPU
    */
@@ -39,6 +49,11 @@ export class Cpu {
    */
   public static readonly TWO_VCPU = Cpu.of('2 vCPU')
 
+  /**
+   * 4 vCPU
+   */
+  public static readonly FOUR_VCPU = Cpu.of('4 vCPU')
+
   /**
    * Custom CPU unit
    *
@@ -60,6 +75,16 @@ export class Cpu {
  * The amount of memory reserved for each instance of your App Runner service.
  */
 export class Memory {
+  /**
+   * 0.5 GB(for 0.25 vCPU)
+   */
+  public static readonly HALF_GB = Memory.of('0.5 GB')
+
+  /**
+   * 1 GB(for 0.25 or 0.5 vCPU)
+   */
+  public static readonly ONE_GB = Memory.of('1 GB')
+
   /**
    * 2 GB(for 1 vCPU)
    */
@@ -75,6 +100,26 @@ export class Memory {
    */
   public static readonly FOUR_GB = Memory.of('4 GB')
 
+  /**
+   * 6 GB(for 2 vCPU)
+   */
+  public static readonly SIX_GB = Memory.of('6 GB')
+
+  /**
+   * 8 GB(for 4 vCPU)
+   */
+  public static readonly EIGHT_GB = Memory.of('8 GB')
+
+  /**
+   * 10 GB(for 4 vCPU)
+   */
+  public static readonly TEN_GB = Memory.of('10 GB')
+
+  /**
+   * 12 GB(for 4 vCPU)
+   */
+  public static readonly TWELVE_GB = Memory.of('12 GB')
+
   /**
    * Custom Memory unit
    *