m/test/localregistry: use osbase/oci/registry

This replaces the localregistry implementation with a small wrapper
around the new registry package.

The images attribute of the Bazel rule was changed from a list to a
dict, which makes the repository and tag independent from the file path.

Change-Id: I1f6213dd67f7bdcf2373fe136958caa68b9f4d10
Reviewed-on: https://review.monogon.dev/c/monogon/+/4089
Reviewed-by: Tim Windelschmidt <tim@monogon.tech>
Tested-by: Jenkins CI
diff --git a/metropolis/test/e2e/connectivity/connectivity.go b/metropolis/test/e2e/connectivity/connectivity.go
index 070bacc..7ecbb08 100644
--- a/metropolis/test/e2e/connectivity/connectivity.go
+++ b/metropolis/test/e2e/connectivity/connectivity.go
@@ -218,7 +218,7 @@
 			Spec: corev1.PodSpec{
 				Containers: []corev1.Container{{
 					Name:  "connectivitytester",
-					Image: "test.monogon.internal/metropolis/test/e2e/connectivity/agent/agent_image",
+					Image: "test.monogon.internal/connectivity/agent:latest",
 					Stdin: true,
 				}},
 				EnableServiceLinks: ptr.To(false),