Regularly clean up E2E resource groups (#2814)

* Cleanup script + yaml

* Another shot

* Trace

* Prevent trigger

e2e-cleanup.ps1

@@ -0,0 +1,30 @@
+Set-PSDebug -Trace 1
+
+$rgs = Get-AzResourceGroup -Name azcopy-newe2e-*
+
+$rmTarget = @()
+
+foreach($rg in $rgs) {
+    if ($rg.Tags)
+    {
+        $unixTime = $rg.Tags["creation"]
+
+        if ($unixTime) {
+            $date = (Get-Date 01.01.1970)+[System.TimeSpan]::FromSeconds($unixTime)
+            if ($date.AddDays(1).CompareTo((Get-Date)) -eq -1) {
+                $rmTarget = $rmTarget + @($rg)
+            }
+        } else {
+            # If it isn't present, it's considered too old and needs to be deleted.
+            $rmTarget = $rmTarget + @($rg)
+        }
+    } else {
+        $rmTarget = $rmTarget + @($rg)
+    }
+}
+
+foreach ($rg in $rmTarget) {
+    $rgn = $rg.ResourceGroupName
+    Write-Output "Removing $rgn"
+    Remove-AzResourceGroup -Name $rgn -Force
+}

e2e-cleanup.yml

@@ -0,0 +1,20 @@
+trigger: none
+pr: none
+
+schedules:
+- cron: "0 0 * * *"
+  displayName: "E2E cleanup (Nightly)"
+  branches:
+    include: [ "main" ]
+  always: true
+
+steps:
+- task: AzurePowerShell@5
+  displayName: Clean up E2E runs
+  inputs:
+    azureSubscription: 'e2ecleanup'
+    ScriptType: 'FilePath'
+    ScriptPath: 'e2e-cleanup.ps1'
+    FailOnStandardError: true
+    pwsh: true
+    azurePowershellVersion: 'LatestVersion'