fix: missing location parameter in namespace request

[matt-FFFFFF]

This PR replaces #159 to enable CI/CD checks with required secrets.

Original PR by @jonas-budde

---

Description

Hi, i got this error when using the submodule "namespace":

│ Error: Failed to create/update resource
│ 
│   with module.namespace.azapi_resource.this,
│   on .terraform/modules/namespace/main.tf line 1, in resource "azapi_resource" "this":
│    1: resource "azapi_resource" "this" {
│ 
│ creating/updating Resource: (ResourceId
│ "/subscriptions/xyz/resourceGroups/rg-aks-gwc-dev/providers/Microsoft.ContainerService/managedClusters/aks-xyz-gwc-dev/managedNamespaces/xyz"
│ / Api Version "2025-10-01"): PUT
│ https://management.azure.com/subscriptions/xyz/resourceGroups/rg-aks-gwc-dev/providers/Microsoft.ContainerService/managedClusters/aks-xyz-gwc-dev/managedNamespaces/xyz
│ --------------------------------------------------------------------------------
│ RESPONSE 400: 400 Bad Request
│ ERROR CODE: LocationRequired
│ --------------------------------------------------------------------------------
│ {
│   "error": {
│     "code": "LocationRequired",
│     "message": "The location property is required for this definition."
│   }
│ }
│ --------------------------------------------------------------------------------
│ 

The API apprently has changed and now needs the location as a property in the request body.

Type of Change

• Non-module change (e.g. CI/CD, documentation, etc.)
• Azure Verified Module updates:
  • Bugfix containing backwards compatible bug fixes
    • Someone has opened a bug report issue, and I have included "Closes #{bug_report_issue_number}" in the PR description.
    • The bug was found by the module author, and no one has opened an issue to report it yet.
  • Feature update backwards compatible feature updates.
  • Breaking changes.
  • Update to documentation

Checklist

• I'm sure there are no other open Pull Requests for the same update/change
• My corresponding pipelines / checks run clean and green without any errors or warnings
• I did run all pre-commit checks