Adding Amazon EKS Pod Identity Add-on Support

[Pjv93]

**Is your feature request related to a problem?
I would like to request the addition of support for the Amazon Elastic Kubernetes Service (EKS) Pod Identity addon in the EKS Anywhere Addons repository. The Amazon EKS Pod Identity addon is a valuable feature that allows applications running on Amazon EKS clusters to securely obtain AWS Identity and Access Management (IAM) credentials. This capability is essential for applications that need to interact with AWS services, such as Amazon S3, DynamoDB, or AWS Secrets Manager, while running within Kubernetes pods.

Describe the solution
Describe the solution you'd like
Adding support for the Amazon EKS Pod Identity addon would greatly benefit users who deploy applications on EKS Anywhere clusters. This feature enables applications to assume IAM roles based on annotations assigned to Kubernetes service accounts, providing fine-grained access control to AWS resources. This is particularly valuable in scenarios where applications need to access AWS resources securely without relying on static IAM credentials.

Additional context
Amazon EKS Pod Identity: A New Way for Applications on EKS to Obtain IAM Credentials

Amazon EKS Pod Identity Documentation