fix(lambda): PROVIDED runtime will be EOL soon, deprecate in favor of PROVIDED_AL2 (#26904)

`We recommend that you upgrade your existing Custom Runtime based on Amazon Linux 1 functions to Custom Runtime based on Amazon Linux 2 ('provided.al2') before December 31, 2023.`

>Hello,
>
>We are contacting you as we have identified that your AWS Account currently has one or more Lambda functions using Custom Runtime based on Amazon Linux 1 ('provided') runtime.
>
>We are ending support for Custom Runtime based on Amazon Linux 1 in AWS Lambda, in line with Amazon Linux AMI end of maintenance support on December 31, 2023 [1].
>
>As described in the Lambda runtime support policy [2], end of support for language runtimes in Lambda happens in two stages. Starting December 31, 2023, Lambda will no longer apply security patches and other updates to the Custom Runtime based on Amazon Linux 1 runtime used by Lambda functions, and functions using Custom Runtime based on Amazon Linux 1 will no longer be eligible for technical support. In addition, you will no longer be able to create new Lambda functions using the Custom Runtime based on Amazon Linux 1 runtime. Starting January 30, 2024, you will no longer be able to update existing functions using the Custom Runtime based on Amazon Linux 1 runtime.
>
>We recommend that you upgrade your existing Custom Runtime based on Amazon Linux 1 functions to Custom Runtime based on Amazon Linux 2 ('provided.al2') before December 31, 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 However, they will be running on an unsupported runtime which is no longer maintained or patched by the AWS Lambda team.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 Custom Runtime based on Amazon Linux 1 for the $LATEST function version. A list of affected resources can be found in 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 Custom Runtime based on Amazon Linux 1, 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=='provided'].FunctionArn"
>
>If you have any concerns or require further assistance, please contact AWS Support [4].

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

Author: robertd

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

@@ -249,6 +249,7 @@ export class Runtime {
 
   /**
    * The custom provided runtime (provided)
+   * @deprecated Legacy runtime no longer supported by AWS Lambda. Migrate to the latest provided.al2 runtime.
    */
   public static readonly PROVIDED = new Runtime('provided', RuntimeFamily.OTHER);