[Helix] ReAdd AzureLinux Arm64 Queues

[mdh1418]

Reattempt moving Helix queues from Ubuntu 2204 to AzureLinux arm64. The original attempt #117790 was reverted in #117897 because of capacity issues, which should be fixed now.

[Copilot]

Pull Request Overview

This PR migrates Helix ARM64 queues from Ubuntu 2204 to AzureLinux 3.0, re-attempting a previous change that was reverted due to capacity issues. The changes update queue references across build pipeline configuration files.

• Updates Helix queue references from Ubuntu.2204.ArmArch to AzureLinux.3.Arm64 for ARM and ARM64 platforms
• Applies changes across libraries, installer, and CoreCLR pipeline configurations
• Standardizes capitalization in some Alpine queue names

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

File	Description
eng/pipelines/libraries/helix-queues-setup.yml	Updates queue references for Linux ARM/ARM64 platforms and Alpine variants to use AzureLinux hosts
eng/pipelines/installer/helix-queues-setup.yml	Updates queue references for Linux ARM/ARM64 and Alpine ARM64 platforms to use AzureLinux hosts
eng/pipelines/coreclr/templates/helix-queues-setup.yml	Comprehensive update of queue references across public/internal projects, including simplified queue names for native AzureLinux ARM64

[mdh1418]

It sounds like there's still some value in also testing on Ubuntu distros. What would be a good balance between which jobs should be sent to AzureLinux.3 vs Ubuntu 22.04? Would now be a good time to bump to Ubuntu 25.04 and would we have capacity for that?

[richlander]

Let to clarify. Our use of Ubuntu and Azure Linux VMs is nuanced.

Here are the goals (modulo complications):

• Azure Linux should be exclusively used as the VM host for containers (which is what this PR is targeting).
• Raw VM testing (no container used) should be 50% Azure Linux / 50% Ubuntu.
• We should have raw Azure Linux VM testing for both Arm64 and x64.
• It's fine if we only get Ubuntu VM coverage on x64.

[mdh1418]

Should this still be containers?

[richlander]

Let's go with VMs, like you have it. looks good.