Ubuntu 20.04 GA VM support being dropped April 1, 2025

[derekbruening]

Github will stop supporting the Ubuntu 20.04 images on April 1. We need to upgrade these workflows:

$ git grep ubuntu-2 .github/
.github/workflows/ci-aarchxx.yml:    runs-on: ubuntu-20.04
.github/workflows/ci-aarchxx.yml:    runs-on: ubuntu-20.04
.github/workflows/ci-clang.yml:    runs-on: ubuntu-20.04
.github/workflows/ci-docs.yml:    runs-on: ubuntu-20.04
.github/workflows/ci-package.yml:    runs-on: ubuntu-20.04
.github/workflows/ci-package.yml:    runs-on: ubuntu-20.04
.github/workflows/ci-x86.yml:    runs-on: ubuntu-20.04

There may well be test failures to fix. Xref the work to convert the dynamorio repository workflows: DynamoRIO/dynamorio#7270 which ran into a number of test failures.

[Artem-OSSRevival]

Which version do we move to? 22.04 or 24.04?

[derekbruening]

Which version do we move to? 22.04 or 24.04?

22.04 (that is what dynamorio's tests are supporting as the link above DynamoRIO/dynamorio#7270 shows; trying to do 24.04 may hit dynamorio problems and be a lot more work).