Describe the bug
Unable to create ClusterSecretStore in AWS in the ap-southeast-7 region.

To Reproduce
Steps to reproduce the behavior:

1. deploy external-secrets with helm using terraform:

   module "external_secrets" {
     source = "github.com/aws-ia/terraform-aws-eks-blueprints?ref=v4.32.1//modules/kubernetes-addons/external-secrets"
   
     helm_config = {
       version = "0.12.1"
     }
   
     addon_context = var.addon_context
   }

2. create ClusterSecretStore:

   apiVersion: external-secrets.io/v1beta1
   kind: ClusterSecretStore
   metadata:
     name: "cluster-secret-store"
   spec:
     provider:
       aws:
         service: SecretsManager
         region: ap-southeast-7
         auth:
           jwt:
             serviceAccountRef:
               name: "external-secrets-sa"
               namespace: "external-secrets"

   Got this error:

   Error from server (Forbidden): error when creating "STDIN": admission webhook "validate.clustersecretstore.external-secrets.io" denied the request: region not found: ap-southeast-7

Expected behavior
ClusterSecretStore should be created in ap-southeast-7 which is the new region

Screenshots
NA

Additional context

• AWS Thailand region was launched on Jan 7th, 2025
• aws-sdk-go-v2 have just supported ap-southeast-7 since Release (2025-01-08)