fix(self-managed): Fix AWS provider constraint

[maxdanilov]

Description

fix(self-managed): Fix AWS provider constraint

Update to current version, relax constraint to work with any 5.x versions in the future

Context: https://camunda.slack.com/archives/C05S0M7KG6A/p1725028961672329

How to check:

• Create config.tf from https://docs.camunda.io/docs/self-managed/setup/deploy/amazon/amazon-eks/eks-terraform/#terraform-prerequsites (of this PR)
• Create main.tf from https://docs.camunda.io/docs/self-managed/setup/deploy/amazon/amazon-eks/eks-terraform/#cluster-module
• Run terraform init

When should this change go live?

• This is a bug fix, security concern, or something that needs urgent release support.
• This is already available but undocumented and should be released within a week.
• This on a specific schedule and the assignee will coordinate a release with the DevEx team. (apply hold label or convert to draft PR)
• This is part of a scheduled alpha or minor. (apply alpha or minor label)
• There is no urgency with this change and can be released at any time.

PR Checklist

• My changes are for an already released minor and are in /versioned_docs directory.
• My changes are for the next minor and are in /docs directory (aka /next/).

• My changes require an Engineering review, and I've assigned the Engineering DRI or delegate.
• My changes require a technical writer review, and I've assigned @camunda/tech-writers as a reviewer.

[leiicamundi]

lgtm!