Restoring upm-ci installation

Author: michalChrobot

.yamato/package-pack.yml

@@ -13,7 +13,7 @@ package_test_-_ngo:
     PVP_PROFILE: supported rme
   timeout: 0.25
   commands:
-      - npm install -g "$UPMCI_PKG" -g --registry https://artifactory.prd.it.unity3d.com/artifactory/api/npm/upm-npm
+      - npm install -g "$UPMCI_PKG" --registry https://artifactory.prd.it.unity3d.com/artifactory/api/npm/upm-npm
       - upm-ci package pack --package-path com.unity.netcode.gameobjects
       - upm-pvp xray --packages "upm-ci~/packages/*.tgz" --results upm-ci~/xray
       - upm-pvp require "$PVP_PROFILE" --allow-missing --results upm-ci~/xray --exemptions upm-ci~/xray/new-exemptions.json

.yamato/package-tests.yml

@@ -10,6 +10,7 @@ package_test_-_ngo_{{ editor }}_{{ platform.name }}:
     image: {{ platform.image }}
     flavor: {{ platform.flavor}}
   commands:
+    - npm install upm-ci-utils@stable -g --registry https://artifactory.prd.cds.internal.unity3d.com/artifactory/api/npm/upm-npm
     - {% if platform.name == "ubuntu" %}DISPLAY=:0 {% endif %}upm-ci package test -u {{ editor }} --type package-tests
   artifacts:
     logs: