ci: Add an ARM Linux test workflow

Like the macOS jobs are mixed between Intel and ARM, this changes one of
the Linux jobs to use ARM.

Author: QuLogic

.github/workflows/tests.yml

@@ -78,7 +78,7 @@ jobs:
             # https://bugreports.qt.io/projects/PYSIDE/issues/PYSIDE-2346
             pyside6-ver: '!=6.5.1'
             extra-requirements: '-r requirements/testing/extra.txt'
-          - os: ubuntu-22.04
+          - os: ubuntu-22.04-arm
             python-version: '3.12'
             # https://www.riverbankcomputing.com/pipermail/pyqt/2023-November/045606.html
             pyqt6-ver: '!=6.6.0'