Run link verification step at CI/Manual (Azure#16180)

Author: sima-zhu

eng/pipelines/templates/jobs/archetype-sdk-client.yml

@@ -66,12 +66,14 @@ jobs:
         displayName: "Use Python 3.6"
         inputs:
           versionSpec: "3.6"
-      - ${{ if eq(variables['Build.Reason'], 'PullRequest') }}:
-        - template: /eng/common/pipelines/templates/steps/verify-links.yml
-          parameters:
+      - template: /eng/common/pipelines/templates/steps/verify-links.yml
+        parameters:
+          ${{ if eq(variables['Build.Reason'], 'PullRequest') }}:
             Directory: ''
             Urls: (git diff origin/${env:SYSTEM_PULLREQUEST_TARGETBRANCH} HEAD --name-only -- '*.md')
-            CheckLinkGuidance: $true
+          ${{ if ne(variables['Build.Reason'], 'PullRequest') }}:
+            Directory: sdk/${{ parameters.ServiceDirectory }}
+          CheckLinkGuidance: $true
       - script: |
           pip install setuptools wheel
           pip install doc-warden==$(DocWardenVersion)