[ci] Stop using personal domain for CI

Migrate away from using a private domain for build infra.

Signed-off-by: Timofei Larkin <lllamnyp@gmail.com>

hack/e2e-prepare-cluster.bats

@@ -136,25 +136,25 @@ machine:
     mirrors:
       docker.io:
         endpoints:
-        - https://dockerio.nexus.lllamnyp.su
+        - https://dockerio.nexus.aenix.org
       cr.fluentbit.io:
         endpoints:
-        - https://fluentbit.nexus.lllamnyp.su
+        - https://fluentbit.nexus.aenix.org
       docker-registry3.mariadb.com:
         endpoints:
-        - https://mariadb.nexus.lllamnyp.su
+        - https://mariadb.nexus.aenix.org
       gcr.io:
         endpoints:
-        - https://gcr.nexus.lllamnyp.su
+        - https://gcr.nexus.aenix.org
       ghcr.io:
         endpoints:
-        - https://ghcr.nexus.lllamnyp.su
+        - https://ghcr.nexus.aenix.org
       quay.io:
         endpoints:
-        - https://quay.nexus.lllamnyp.su
+        - https://quay.nexus.aenix.org
       registry.k8s.io:
         endpoints:
-        - https://k8s.nexus.lllamnyp.su
+        - https://k8s.nexus.aenix.org
   files:
   - content: |
       [plugins]