Use different service connection and az CLI for ACR auth

eng/common/pipelines/templates/steps/docker-pull-image.yml

@@ -1,15 +1,19 @@
 parameters: 
-  - name: ContainerRegistryClientId
-    type: string
-  - name: ContainerRegistryClientSecret
+  - name: ServiceConnectionName
     type: string
+    default: azuresdkimages_container-registry
   - name: ImageId
     type: string
 steps:
-- pwsh: |
-    $containerRegistry = ("${{parameters.ImageId}}" -split "\/")[0]
-    docker login $containerRegistry -u "${{ parameters.ContainerRegistryClientId }}" -p "${{ parameters.ContainerRegistryClientSecret }}"
-  displayName: Login container registry
-- pwsh: |
-    docker pull '${{ parameters.ImageId}}'
-  displayName: Pull docker image ${{ parameters.ImageId }}
+  - task: AzureCLI@2
+    displayName: Authenticate to Container Registry
+    inputs:
+      azureSubscription: ${{ parameters.ServiceConnectionName }}
+      scriptType: pscore
+      scriptLocation: inlineScript
+      inlineScript: |
+        # azuresdkimages.azurecr.io/pyrefautocr:latest -> azuresdkimages
+        $containerRegistryName = ("${{ parameters.ImageId }}" -split "\/")[0].Replace(".azurecr.io", "")
+
+        az acr login --name $containerRegistryName
+        docker pull '${{ parameters.ImageId }}'

eng/common/pipelines/templates/steps/update-docsms-metadata.yml

@@ -87,8 +87,6 @@ steps:
     - ${{ if ne(parameters.DocValidationImageId, '') }}:
       - template: /eng/common/pipelines/templates/steps/docker-pull-image.yml
         parameters:
-          ContainerRegistryClientId: $(azuresdkimages-cr-clientid)
-          ContainerRegistryClientSecret: $(azuresdkimages-cr-clientsecret)
           ImageId: '${{ parameters.DocValidationImageId }}'
     - pwsh: |
         $packageInfoJson = '${{ convertToJson(parameters.PackageInfoLocations) }}'.Trim('"').Replace("\\", "/")