Update Alpine infra images to 3.24

[richlander]

Summary

Update Alpine-based infrastructure image references from Alpine 3.23 to Alpine 3.24.

Area	Old	New
Build container	alpine-3.23-amd64	alpine-3.24-amd64
Helix x64	Alpine.323 / alpine-3.23-helix-amd64	Alpine.324 / alpine-3.24-helix-amd64
Helix arm32	Alpine.323 / alpine-3.23-helix-arm32v7	Alpine.324 / alpine-3.24-helix-arm32v7
Helix arm64	Alpine.323 / alpine-3.23-helix-arm64v8	Alpine.324 / alpine-3.24-helix-arm64v8

Validation

The usual dotnet/versions image-info JSON appears stale due to dotnet/docker-tools#2142, so I validated these exact tags directly against the MCR registry:

Tag	Digest
alpine-3.24-amd64	sha256:810424ef4eee16d457f308d6d1b018fb02f4301c14ac5f8dc39f7b53da77be03
alpine-3.24-helix-amd64	sha256:a31c5d53a8c241bf7ad42e2dea0980e538ce1acee6968c11a61b9c23869460ed
alpine-3.24-helix-arm64v8	sha256:9c20e0a9728be8eebfc8aa5e096488229ffed20c6cd99c20b90637ac29284df2
alpine-3.24-helix-arm32v7	sha256:64b983ce8a9908728e04f2ec19fdd76efda04febd77d8961f416bd07c9180d60

No Alpine.323 / alpine-3.23 references remain under the updated pipeline/workflow paths.

Lifecycle

Version	Release date	EOL
Alpine 3.23	2025-12-03	2027-11-01
Alpine 3.24	2026-06-09	2028-06-01

CI coverage

No extra pipeline is required for baseline coverage: the default runtime pipeline covers the versioned Alpine linux-musl x64 path and CoreCLR linux-musl arm64 path. runtime-extra-platforms can be triggered if dedicated libraries linux-musl arm64 coverage is desired.

Reference: https://github.com/dotnet/runtime/blob/main/docs/project/os-onboarding.md

Note

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Pull request overview

This PR updates dotnet/runtime’s infrastructure and Helix queue definitions to use Alpine 3.24 (and the corresponding dotnet-buildtools/prereqs tags / pinned digests) instead of Alpine 3.23, ensuring musl-based build/test legs and Helix runs are aligned to the newer Alpine baseline.

Changes:

• Updated Alpine Helix queue image tags and digests (x64 + arm64) in pipeline templates.
• Updated musl “oldest/latest” Helix platform aliases from Alpine.323 to Alpine.324.
• Updated the musl innerloop build container image reference from alpine-3.23-amd64 to alpine-3.24-amd64 (with digest pin).

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
eng/pipelines/libraries/helix-queues-setup.yml	Bumps libraries Helix musl queue images from Alpine 3.23 to 3.24 (tag + digest).
eng/pipelines/installer/helix-queues-setup.yml	Bumps installer Helix musl queue images from Alpine 3.23 to 3.24 (tag + digest).
eng/pipelines/helix-platforms.yml	Updates Helix variable aliases/comments from Alpine.323 to Alpine.324 for musl platforms.
eng/pipelines/coreclr/templates/helix-queues-setup.yml	Bumps CoreCLR Helix musl queue images (x64/arm32/arm64) from Alpine 3.23 to 3.24 (tag + digest).
eng/pipelines/common/templates/pipeline-with-resources.yml	Updates the Alpine-based musl innerloop build container image reference to Alpine 3.24 (tag + digest).