Add sparse checkout on build docs and build extended jobs to align with build and test (#46699)

Author: scbedd

eng/pipelines/templates/jobs/ci.yml

@@ -145,6 +145,13 @@ jobs:
       os: linux
 
     steps:
+    - template: /eng/common/pipelines/templates/steps/sparse-checkout.yml
+      parameters:
+        ${{ if endsWith(variables['Build.Repository.Name'], '-pr') }}:
+          TokenToUseForAuth: $(azuresdk-github-pat)
+        Paths:
+          - '**'
+
     - template: /eng/pipelines/templates/steps/download-package-artifacts.yml
 
     - template: /eng/pipelines/templates/steps/resolve-package-targeting.yml
@@ -177,6 +184,13 @@ jobs:
       os: linux
 
     steps:
+    - template: /eng/common/pipelines/templates/steps/sparse-checkout.yml
+      parameters:
+        ${{ if endsWith(variables['Build.Repository.Name'], '-pr') }}:
+          TokenToUseForAuth: $(azuresdk-github-pat)
+        Paths:
+          - '**'
+
     - template: /eng/pipelines/templates/steps/download-package-artifacts.yml
 
     - template: /eng/pipelines/templates/steps/resolve-package-targeting.yml