adding upm-ci-utils install for new package signing

Author: stefanunity

.yamato/upm-ci.yml

@@ -22,6 +22,7 @@
     # really work with them. Move them into the package for when we run upm-ci here.
     - move /Y .\Assets\Samples .\Packages\com.unity.inputsystem
     - move /Y .\Assets\Samples.meta .\Packages\com.unity.inputsystem
+    - npm install upm-ci-utils@stable -g --registry https://artifactory-upload.prd.it.unity3d.com/artifactory/api/npm/upm-npm
     - upm-ci package pack --package-path ./Packages/com.unity.inputsystem/
     # Run upm-ci verification tests as well as tests contained in the package.
     - upm-ci package test --package-path ./Packages/com.unity.inputsystem/ -u %EDITOR_VERSION%
@@ -74,6 +75,7 @@
     # really work with them. Move them into the package for when we run upm-ci here.
     - mv ./Assets/Samples ./Packages/com.unity.inputsystem
     - mv ./Assets/Samples.meta ./Packages/com.unity.inputsystem
+    - npm install upm-ci-utils@stable -g --registry https://artifactory-upload.prd.it.unity3d.com/artifactory/api/npm/upm-npm
     - upm-ci package pack --package-path ./Packages/com.unity.inputsystem/
     # Run upm-ci verification tests as well as tests contained in the package.
     - upm-ci package test --package-path ./Packages/com.unity.inputsystem/ -u $EDITOR_VERSION {% if category.name == "functional" and platform.name == "mac" or platform.name == "linux" %} --enable-code-coverage --code-coverage-options "generateAdditionalMetrics;generateHtmlReport;assemblyFilters:+Unity.InputSystem;pathReplacePatterns:@*,,Library/PackageCache,Packages" --extra-utr-arg="--coverage-results-path={{ yamato_source_dir_nix }}/upm-ci~/test-results/CodeCoverage/Package --coverage-upload-options=\"reportsDir:upm-ci~/test-results/CodeCoverage/Package;name:{{platform.name}}_{{editor.version}}_pkg;flags:{{platform.name}}_{{editor.version}}_pkg\"" {% endif %}