[vcpkg] Add disk space report to Windows PR/CI (#12113)

* [vcpkg] Add disk space report to PR/CI

Example output:
```
Disk Label           Size     Free Space
---- -----           ----     ----------
C:   Sabrent         1907 GiB 1239 GiB
D:   Dev             447 GiB  383 GiB
E:   Samsung 960 Pro 1908 GiB 1084 GiB
H:   Rocket          3815 GiB 863 GiB
R:                   0 B      0 B
S:                   0 B      0 B
```

scripts/azure-pipelines/windows/azure-pipelines.yml

@@ -15,6 +15,11 @@ jobs:
     displayName: 'Initialize Environment'
     inputs:
       filePath: 'scripts/azure-pipelines/windows/initialize-environment.ps1'
+  - task: PowerShell@2
+    displayName: 'Report on Disk Space'
+    condition: always()
+    inputs:
+      filePath: 'scripts/azure-pipelines/windows/disk-space.ps1'
     # Note: D: is the Azure machines' temporary disk.
   - task: CmdLine@2
     displayName: 'Build vcpkg'
@@ -48,6 +53,11 @@ jobs:
     inputs:
       testResultsFiles: '$(System.ArtifactsDirectory)/xml-results/${{ parameters.triplet }}.xml'
     condition: always()
+  - task: PowerShell@2
+    displayName: 'Report on Disk Space After Build'
+    condition: always()
+    inputs:
+      filePath: 'scripts/azure-pipelines/windows/disk-space.ps1'
   - task: PublishBuildArtifacts@1
     displayName: 'Publish Artifact: ${{ parameters.triplet }} port build failure logs'
     inputs:

scripts/azure-pipelines/windows/disk-space.ps1

@@ -0,0 +1,35 @@
+# Copyright (c) Microsoft Corporation.
+# SPDX-License-Identifier: MIT
+#
+
+<#
+.SYNOPSIS
+Prints total and free disk space for each disk on the system
+#>
+
+Function Format-Size {
+    [CmdletBinding()]
+    Param([long]$Size)
+
+    if ($Size -lt 1024) {
+        $Size = [int]$Size
+        return "$Size B"
+    }
+
+    $Size = $Size / 1024
+    if ($Size -lt 1024) {
+        $Size = [int]$Size
+        return "$Size KiB"
+    }
+
+    $Size = $Size / 1024
+    if ($Size -lt 1024) {
+        $Size = [int]$Size
+        return "$Size MiB"
+    }
+
+    $Size = [int]($Size / 1024)
+    return "$Size GiB"
+}
+
+Get-CimInstance -ClassName Win32_LogicalDisk | Format-Table -Property @{Label="Disk"; Expression={ $_.DeviceID }},@{Label="Label"; Expression={ $_.VolumeName }},@{Label="Size"; Expression={ Format-Size($_.Size) }},@{Label="Free Space"; Expression={ Format-Size($_.FreeSpace) }}