[Bug 2138326] Re: New upstream microrelease .NET 8.0.123/8.0.23

[Mateus Rodrigues de Morais]

Questing autopkgtest results:

  - dotnet8: questing/dotnet8/8.0.123-8.0.23-0ubuntu1~25.10.1 [amd64]
    + ✅ dotnet8 on questing for amd64   @ 21.01.26 15:07:39
      • Log: https://autopkgtest.ubuntu.com/results/autopkgtest-questing-mateus-morais-dotnet-servicing-jan-2026-2/questing/amd64/d/dotnet8/20260121_150739_96101@/log.gz
  - dotnet8: questing/dotnet8/8.0.123-8.0.23-0ubuntu1~25.10.1 [arm64]
    + ✅ dotnet8 on questing for arm64   @ 21.01.26 15:09:13
      • Log: https://autopkgtest.ubuntu.com/results/autopkgtest-questing-mateus-morais-dotnet-servicing-jan-2026-2/questing/arm64/d/dotnet8/20260121_150913_66056@/log.gz
  - dotnet8: questing/dotnet8/8.0.123-8.0.23-0ubuntu1~25.10.1 [ppc64el]
    + ✅ dotnet8 on questing for ppc64el @ 21.01.26 16:36:41
      • Log: https://autopkgtest.ubuntu.com/results/autopkgtest-questing-mateus-morais-dotnet-servicing-jan-2026-2/questing/ppc64el/d/dotnet8/20260121_163641_558d6@/log.gz
  - dotnet8: questing/dotnet8/8.0.123-8.0.23-0ubuntu1~25.10.1 [s390x]
    + ✅ dotnet8 on questing for s390x   @ 21.01.26 15:17:27
      • Log: https://autopkgtest.ubuntu.com/results/autopkgtest-questing-mateus-morais-dotnet-servicing-jan-2026-2/questing/s390x/d/dotnet8/20260121_151727_35d3f@/log.gz

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https://bugs.launchpad.net/bugs/2138326

Title:
  New upstream microrelease .NET 8.0.123/8.0.23

Status in dotnet8 package in Ubuntu:
  New
Status in dotnet8 source package in Jammy:
  New
Status in dotnet8 source package in Noble:
  New
Status in dotnet8 source package in Questing:
  New

Bug description:
  This is the tracking bug for the .NET 8 January 2026 release.

  [Impact]

   * This corresponds to an upstream microrelease released on January 13th, 2026. See also:
     - release announcement: https://github.com/dotnet/source-build/discussions/5460
     - .NET 8.0.23 Runtime release notes: https://github.com/dotnet/core/blob/main/release-notes/8.0/8.0.23/8.0.23.md
     - .NET 8.0.123 SDK release notes: https://github.com/dotnet/core/blob/main/release-notes/8.0/8.0.23/8.0.123.md

   * It is beneficial for all our users (including LTS users) to have
  access to the latest .NET stack.

  [Test Case]

   * The package should build successfully in -proposed (respectively).

   * The packages should be installable on jammy, noble, and questing on
     amd64, arm64, s390x and ppc64el architectures.

   * Autopackage tests should pass.

  [Regression Potential]

   * The dotnet8 package has no reverse dependencies.

   * The upstream testing routine is usually satisfactory (see for
  example Microsoft's public Azure Pipeline for .NET related
  repositories: https://dev.azure.com/dnceng-public/public/_build), but
  there is always a risk of something breaking.

  [Other]

  * The tarball originated from here:
  https://github.com/canonical/dotnet-source-
  build/actions/runs/20970209269

  * 8.0.23 is the version number of the .NET Runtime and 8.0.123 is the version
    number of the .NET SDK.

  * We are only building the 8.0.1xx feature band, because this is the only
    feature band that allows building from source. See explanation of feature
    bands: https://learn.microsoft.com/en-us/dotnet/core/releases-and-support#feature-bands-sdk-only

  * Overview of how dotnet is versioned: https://learn.microsoft.com/en-
  us/dotnet/core/versions/

  * PPA for review: https://launchpad.net/~mateus-
  morais/+archive/ubuntu/dotnet-servicing-jan-2026-2/+packages

  * In order to keep all dotnet* packages consistent, this release also includes debian/ changes uploaded to resolute, which are:
    * d/t/regular-tests: synced with upstream.
      - Removed release-version-sane test following upstream.
      - Removed unnecessary files from source tree.
      - cgroup-limit/test.sh: fix autopkgtest regression in Ubuntu releases with
        rust-coreutils by comparing the cgroup filesystem ID instead of friendly
        name.
    * d/t/run-regular-tests: fixed test username typo.
    * d/rules: cleaned up trailing spaces.
    * d/eng/test-runner: removed unnecessary files from source tree.

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