Update Alpine helix references (#62243)

Co-authored-by: wtgodbe <wigodbe@microsoft.com>

Author: github-actions[bot]

eng/targets/Helix.Common.props

@@ -2,7 +2,7 @@
   <!-- This file is shared between Helix.proj and .csproj files. -->
   <PropertyGroup>
     <HelixQueueAlmaLinux8>(AlmaLinux.8.Amd64.Open)Ubuntu.2204.Amd64.Open@mcr.microsoft.com/dotnet-buildtools/prereqs:almalinux-8-helix-amd64</HelixQueueAlmaLinux8>
-    <HelixQueueAlpine318>(Alpine.318.Amd64.Open)Ubuntu.2204.Amd64.Open@mcr.microsoft.com/dotnet-buildtools/prereqs:alpine-3.18-helix-amd64</HelixQueueAlpine318>
+    <HelixQueueAlpine>(Alpine.321.Amd64.Open)azurelinux.3.Amd64.Open@mcr.microsoft.com/dotnet-buildtools/prereqs:alpine-3.21-helix-amd64</HelixQueueAlpine>
     <HelixQueueDebian12>(Debian.12.Amd64.Open)Ubuntu.2204.Amd64.Open@mcr.microsoft.com/dotnet-buildtools/prereqs:debian-12-helix-amd64</HelixQueueDebian12>
     <HelixQueueFedora41>(Fedora.41.Amd64.Open)Ubuntu.2204.Amd64.Open@mcr.microsoft.com/dotnet-buildtools/prereqs:fedora-41-helix</HelixQueueFedora41>
     <HelixQueueMariner>(Mariner)Ubuntu.2204.Amd64.Open@mcr.microsoft.com/dotnet-buildtools/prereqs:cbl-mariner-2.0-helix-amd64</HelixQueueMariner>
@@ -42,7 +42,7 @@
         <HelixAvailableTargetQueue Include="$(HelixQueueAlmaLinux8)" Platform="Linux" />
 
         <!-- Containers -->
-        <HelixAvailableTargetQueue Include="$(HelixQueueAlpine318)" Platform="Linux" />
+        <HelixAvailableTargetQueue Include="$(HelixQueueAlpine)" Platform="Linux" />
         <HelixAvailableTargetQueue Include="$(HelixQueueDebian12)" Platform="Linux" />
         <HelixAvailableTargetQueue Include="$(HelixQueueFedora41)" Platform="Linux" />
         <HelixAvailableTargetQueue Include="$(HelixQueueMariner)" Platform="Linux" />

eng/targets/Helix.targets

@@ -17,7 +17,7 @@
   <PropertyGroup Condition="'$(TestDependsOnPlaywright)' == 'true'">
     <SkipHelixQueues>
       $(HelixQueueAlmaLinux8);
-      $(HelixQueueAlpine318);
+      $(HelixQueueAlpine);
       $(HelixQueueDebian12);
       $(HelixQueueFedora40);
       $(HelixQueueMariner);