Sync eng/common directory with azure-sdk-tools for PR 4962 (Azure#24238)

* prepare pipeline job bug fix

* Update eng/common/pipelines/templates/jobs/prepare-pipelines.yml

Co-authored-by: Ben Broderick Phillips <[email protected]>

* Update eng/common/pipelines/templates/jobs/prepare-pipelines.yml

Co-authored-by: Albert Cheng <[email protected]>
Co-authored-by: Albert Cheng <[email protected]>
Co-authored-by: Ben Broderick Phillips <[email protected]>

Author: 3 people

eng/common/pipelines/templates/jobs/prepare-pipelines.yml

@@ -23,7 +23,7 @@ jobs:
     name: azsdk-pool-mms-ubuntu-2004-general
     vmImage: MMSUbuntu20.04
   steps:
-    - template: install-pipeline-generation.yml
+    - template: /eng/common/pipelines/templates/steps/install-pipeline-generation.yml
     - template: /eng/common/pipelines/templates/steps/set-default-branch.yml
     # This covers our public repos.
     - ${{ if not(endsWith(parameters.Repository, '-pr'))}}: