fix(lambda): NodeJS14 runtime will be EOL soon, deprecate in favor of…

… newer runtimes (#26903)

>Hello,
>
>We are contacting you as we have identified that your AWS Account currently has one or more Lambda functions using the Node.js 14 runtime.
>
>We are ending support for Node.js 14 in AWS Lambda. This follows Node.js 14 End-Of-Life (EOL) reached on April 30, 2023 [1].
>
>As described in the Lambda runtime support policy [2], end of support for language runtimes in Lambda happens in two stages. Starting November 27, 2023, Lambda will no longer apply security patches and other updates to the Node.js 14 runtime used by Lambda functions, and functions using Node.js 14 will no longer be eligible for technical support. In addition, you will no longer be able to create new Lambda functions using the Node.js 14 runtime. Starting January 25, 2024, you will no longer be able to update existing functions using the Node.js 14 runtime.
>
>We recommend that you upgrade your existing Node.js 14 functions to Node.js 18 before November 27, 2023.
>
>End of support does not impact function execution. Your functions will continue to run. However, they will be running on an unsupported runtime which is no longer maintained or patched by the AWS Lambda team.
>
>This notification is generated for functions using the Node.js 14 runtime for the $LATEST function version. For a list of your affected Lambda functions, please see the 'Affected resources" tab of your AWS Health Dashboard
>
>The following command shows how to use the AWS CLI [3] to list all functions in a specific region using Node.js 14, including published function versions. To find all such functions in your account, repeat this command for each region:
>
>aws lambda list-functions --function-version ALL --region us-east-1 --output text --query "Functions[?Runtime=='nodejs14.x'].FunctionArn"
>
>If you have any concerns or require further assistance, please contact AWS Support [4].

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packages/aws-cdk-lib/aws-lambda/lib/runtime.ts

@@ -90,6 +90,7 @@ export class Runtime {
 
   /**
    * The NodeJS 14.x runtime (nodejs14.x)
+   * @deprecated Legacy runtime no longer supported by AWS Lambda. Migrate to the latest NodeJS runtime.
    */
   public static readonly NODEJS_14_X = new Runtime('nodejs14.x', RuntimeFamily.NODEJS, { supportsInlineCode: true });