New pattern submission - Lambda extesion to retrieve SSM and Secrets Values from PHP Lambda on CDK

[rafaelbernard]

Creating this issue to submit a New Pattern.

GitHub PR for template:

#2321

This pattern shows how to add Lambda Extensions to retrieve SSM Parameter Store and Secrets Manager values for PHP Lambdas using CDK. The PHP language usage on Serverless projects in AWS has been increasing. This pattern will be helpful for many developers migrating their projects to Serverless.

All relevant information is updated at https://github.com/aws-samples/serverless-patterns/blob/eaa9a7acad6daf5aec8bae96180874ec76ce25ee/lambda-extension-ssm-secrets-cdk-php/example-pattern.json

Cheers, Rafael