EKS Addon support configuring namespace

[phuhung273]

Description

EKS Addon now support configuring namespace https://aws.amazon.com/about-aws/whats-new/2025/08/amazon-eks-namespace-configuration-addons/

We should:

• Expose this feature for aws_eks_addon
• Namespace cannot be updated. Can only be remove and recreate as announced

Affected Resource(s) or Data Source(s)

aws_eks_addon

Potential Terraform Configuration

resource "aws_eks_addon" "example" {
  namespace = "my-namespace"
}

References

https://aws.amazon.com/about-aws/whats-new/2025/08/amazon-eks-namespace-configuration-addons/

Would you like to implement the enhancement?

Yes

[github-actions]

Community Guidelines

This comment is added to every new Issue to provide quick reference to how the Terraform AWS Provider is maintained. Please review the information below, and thank you for contributing to the community that keeps the provider thriving! 🚀

Voting for Prioritization

• Please vote on this Issue by adding a 👍 reaction to the original post to help the community and maintainers prioritize it.
• Please see our prioritization guide for additional information on how the maintainers handle prioritization.
• Please do not leave +1 or other comments that do not add relevant new information or questions; they generate extra noise for others following the Issue and do not help prioritize the request.

Volunteering to Work on This Issue

• If you are interested in working on this issue, please leave a comment.
• If this would be your first contribution, please review the contribution guide.
• For new resources and data sources, use skaff to generate scaffolding with comments detailing common expectations.

[truongnht]

@ewbankkit may I know if there are any progress in this issue and #44087 addressing it