[BUG] Test for SCS-0104 fails for other image source

The source of images is checked to be with prefixes documented as examples.

We added our prefix to the test but imho the test should only validate if the source is set to a correct url.

diff --git a/Tests/iaas/scs_0104_standard_images/standard_images.py b/Tests/iaas/scs_0104_standard_images/standard_images.py
index 6f8c827..4c35cf1 100644
--- a/Tests/iaas/scs_0104_standard_images/standard_images.py
+++ b/Tests/iaas/scs_0104_standard_images/standard_images.py
@@ -13,6 +13,7 @@ _specs = yaml.safe_load(r"""
   source:
   - https://swift.services.a.regiocloud.tech/swift/v1/AUTH_b182637428444b9aa302bb8d5a5a418c/openstack-k8s-capi-images/ubuntu-2404-kube
   - https://swift.services.a.regiocloud.tech/swift/v1/AUTH_b182637428444b9aa302bb8d5a5a418c/openstack-k8s-capi-images/ubuntu-2204-kube
+  - https://repo.uhurutec.io/content/umetal/k8s-node-images
 "ubuntu-capi-image-2":
   # this name_scheme uses `-` to separate base name "ubuntu-capi-image" from version
   # latest openstack-image-manager can be told to use `-` by setting `separator: "-"` on the image
@@ -20,6 +21,7 @@ _specs = yaml.safe_load(r"""
   source:
   - https://swift.services.a.regiocloud.tech/swift/v1/AUTH_b182637428444b9aa302bb8d5a5a418c/openstack-k8s-capi-images/ubuntu-2404-kube
   - https://swift.services.a.regiocloud.tech/swift/v1/AUTH_b182637428444b9aa302bb8d5a5a418c/openstack-k8s-capi-images/ubuntu-2204-kube
+  - https://repo.uhurutec.io/content/umetal/k8s-node-images
 "Ubuntu 24.04":
   source:
   - https://cloud-images.ubuntu.com/releases/noble/