AzDO: truncate intermediate output files to save space

Author: lxbndr

.azure/vs2022.yml

@@ -430,8 +430,15 @@ stages:
               targetType: 'inline'
               script: |
                 # Free some space for install step
-                Remove-Item $(Build.SourcesDirectory)/swift/.git -Recurse -Force
-                Remove-Item $(Build.SourcesDirectory)/llvm-project/.git -Recurse -Force
+                Get-ChildItem $(Agent.BuildDirectory)\1\*.obj -File -Recurse | ForEach-Object {
+                  $CreationTime = $_.CreationTime
+                  $LastAccessTime = $_.LastAccessTime
+                  $LastWriteTime = $_.LastWriteTime
+                  Set-Content -Path $_.FullName -Force -Value "!"
+                  $_.CreationTime = $CreationTime
+                  $_.LastAccessTime = $LastAccessTime
+                  $_.LastWriteTime = $LastWriteTime
+                }
             condition: or(contains(variables['Agent.Name'], 'Azure'), eq(variables['Agent.Name'], 'Hosted Agent'))
           - task: CMake@1
             inputs: