Adjust the CI tests to work for Python 3.12 on EPEL 9, add gating config

Note that by default, virtualenv does not install wheel to Python 3.12+
virtual environments. We set VIRTUALENV_WHEEL=bundle to force it,
otherwise the test is quite useless.

gating.yaml

@@ -0,0 +1,7 @@
+--- !Policy
+
+product_versions:
+  - rhel-9
+decision_context: osci_compose_gate
+rules:
+  - !PassingTestCaseRule {test_case_name: osci.brew-build.tier0.functional}

tests/tests.yml

@@ -7,44 +7,14 @@
     repositories:
     - repo: "https://src.fedoraproject.org/tests/python.git"
       dest: "python"
-    - repo: "https://src.fedoraproject.org/rpms/pyproject-rpm-macros.git"
-      dest: "pyproject-rpm-macros"
     tests:
-    - smoke27:
+    - smoke312:
         dir: python/smoke
-        run: VERSION=2.7 METHOD=virtualenv ./venv.sh
-    - smoke36:
-        dir: python/smoke
-        run: VERSION=3.6 METHOD=virtualenv ./venv.sh
-    - smoke37_optional:
-        dir: python/smoke
-        run: VERSION=3.7 METHOD=virtualenv INSTALL_OR_SKIP=true ./venv.sh
-    - smoke38:
-        dir: python/smoke
-        run: VERSION=3.8 METHOD=virtualenv ./venv.sh
-    - smoke39:
-        dir: python/smoke
-        run: VERSION=3.9 METHOD=virtualenv ./venv.sh
-    - smoke310:
-        dir: python/smoke
-        run: VERSION=3.10 METHOD=virtualenv ./venv.sh
-    - pyproject_pytest:
-        dir: pyproject-rpm-macros/tests
-        run: ./mocktest.sh python-pytest
-    - pyproject_pluggy:
-        dir: pyproject-rpm-macros/tests
-        run: ./mocktest.sh python-pluggy
+        run: VERSION=3.12 METHOD=virtualenv VIRTUALENV_WHEEL=bundle ./venv.sh
     required_packages:
+    - 'https://dl.fedoraproject.org/pub/epel/epel-release-latest-9.noarch.rpm'
+    - 'https://dl.fedoraproject.org/pub/epel/epel-next-release-latest-9.noarch.rpm'
     - gcc
     - virtualenv
-    - python2.7
-    - python3.6
-    - python3.8
-    - python3.9
-    - python3.10-devel
-    - python2-devel
-    - python3-devel
+    - python3.12-devel
     - python3-tox
-    - mock
-    - rpmdevtools
-    - rpm-build