[engsys] Add back pre-publish checks for package validation (#36598)

### Packages impacted by this PR
N/A

### Issues associated with this PR

#36575

### Describe the problem that is addressed by this PR
The pre-publish local tarball validation has been useful to ensure
packages don't have dependency issues. We lost it in refactoring. This
PR brings it back.

---------

Co-authored-by: Wes Haggard <[email protected]>

Author: jeremymeng

eng/pipelines/templates/stages/archetype-js-release.yml

@@ -37,6 +37,9 @@ stages:
                       PackageName: '@azure/template'
                       ServiceDirectory: template
                       TestPipeline: ${{ parameters.TestPipeline }}
+                  - script: >
+                      ls $(Pipeline.Workspace)/${{parameters.ArtifactName}}/${{artifact.name}}/*.tgz && npm install `ls $(Pipeline.Workspace)/${{parameters.ArtifactName}}/${{artifact.name}}/*.tgz`
+                    displayName: Validating package can be installed
                   - template: /eng/common/pipelines/templates/steps/verify-changelog.yml
                     parameters:
                       PackageName: ${{artifact.name}}