Cycle locations, add comments.

Author: StephanTLavavej

azure-devops/create-1es-hosted-pool.ps1

@@ -29,8 +29,9 @@ if ($Arch -ieq 'x64') {
   $ImageOffer = 'WindowsServer'
   $ImageSku = '2025-datacenter-azure-edition'
 } else {
-  $AvailableLocations = @('eastus2', 'northeurope') # Locations where CPP_STL_GitHub has obtained sufficient quota.
-  $AvailableLocationIdx = 1 # Increment for each new pool, to cycle through the available locations.
+  # CPP_STL_GitHub has quota for 672 cores (21 VMs) in westcentralus, not currently used.
+  $AvailableLocations = @('eastus2', 'northeurope') # Locations where CPP_STL_GitHub has quota for 1024 cores (32 VMs).
+  $AvailableLocationIdx = 2 # Increment for each new pool, to cycle through the available locations.
   $Location = $AvailableLocations[$AvailableLocationIdx % $AvailableLocations.Length]
   $VMSize = 'Standard_D32ps_v6'
   $PoolSize = 32