Add a basic gating test

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

@@ -4,14 +4,10 @@
   - role: standard-test-basic
     tags:
     - classic
-    repositories:
-    - repo: "https://src.fedoraproject.org/rpms/pyproject-rpm-macros.git"
-      dest: "pyproject-rpm-macros"
     tests:
-    - pyproject_entrypoints:
-        dir: pyproject-rpm-macros/tests
-        run: ./mocktest.sh python-entrypoints
+    - import_test:
+        dir: .
+        run: python3.12 -c 'import flit_core'
     required_packages:
-    - mock
-    - rpmdevtools
-    - rpm-build
+    - python3.12
+    - python3.12-flit-core