fix(ci): only use LFS on build stage (#8721)

Author: rzhao271

.pipelines/azure-pipelines.main.yml

@@ -38,7 +38,6 @@ extends:
         suppressionsFile: $(Build.SourcesDirectory)/.config/CredScanSuppressions.json
       git:
         fetchDepth: 1
-        lfs: true
         retryCount: 3
       policheck:
         break: true

.pipelines/azure-pipelines.vnext.yml

@@ -32,7 +32,6 @@ extends:
         suppressionsFile: $(Build.SourcesDirectory)/.config/CredScanSuppressions.json
       git:
         fetchDepth: 1
-        lfs: true
         retryCount: 3
       policheck:
         break: true

.pipelines/templates/jobs/build.yml

@@ -18,6 +18,7 @@ jobs:
 
   steps:
   - checkout: self
+    lfs: true
     path: vscode-docs
 
   - download: ${{ parameters.artifactName }}