Add Skip.SetTestPipelineVersion to allow overidiing of use of BuildID for test version (#2849)

Co-authored-by: Chidozie Ononiwu <chononiw@microsoft.com>

eng/common/pipelines/templates/steps/set-test-pipeline-version.yml

@@ -4,10 +4,10 @@ parameters:
   TestPipeline: false
 
 steps:
-- ${{if eq(parameters.TestPipeline, 'true')}}:
+- ${{ if eq(parameters.TestPipeline, 'true') }}:
     - task: PowerShell@2
       displayName: Prep template pipeline for release
-      condition: succeeded()
+      condition: and(succeeded(), ne(variables['Skip.SetTestPipelineVersion'], 'true')) 
       inputs:
         pwsh: true
         workingDirectory: $(Build.SourcesDirectory)