Force nuget install on arm64

Author: DHowett

build/pipelines/templates-v2/job-run-pgo-tests.yml

@@ -45,6 +45,10 @@ jobs:
     displayName: Extract the unpackaged build for PGO
 
   - template: steps-ensure-nuget-version.yml
+    parameters:
+      ${{ if eq(parameters.buildPlatform, 'arm64') }}:
+        # The ARM64 agents do not seem to have NuGet installed
+        forceNugetInstallation: true
 
   - powershell: |-
       $Package = 'Microsoft.Internal.Windows.Terminal.TestContent'

build/pipelines/templates-v2/steps-ensure-nuget-version.yml

@@ -1,12 +1,17 @@
+parameters:
+  - name: forceNugetInstallation
+    type: boolean
+    default: false
+
 steps:
-- ${{ if eq(variables['System.CollectionId'], 'cb55739e-4afe-46a3-970f-1b49d8ee7564') }}:
+- ${{ if and(ne(parameters.forceNugetInstallation, true), eq(variables['System.CollectionId'], 'cb55739e-4afe-46a3-970f-1b49d8ee7564')) }}:
   - pwsh: |-
       Write-Host "Assuming NuGet is already installed..."
       & nuget.exe help
     displayName: Assume NuGet is fine
 
 - ${{ else }}:
   - task: NuGetToolInstaller@1
-    displayName: Use NuGet 6.6.1
+    displayName: Use NuGet 7.0.1
     inputs:
-      versionSpec: 6.6.1
+      versionSpec: 7.0.1