Enable gating test on RHEL9

Resolves: rhbz#1973503

Signed-off-by: Jianwen Ji <jiji@redhat.com>

gating.yaml

@@ -0,0 +1,6 @@
+--- !Policy
+product_versions:
+  - rhel-9
+decision_context: osci_compose_gate
+rules:
+  - !PassingTestCaseRule {test_case_name: osci.brew-build.tier0.functional}

tests/tests.yml

@@ -0,0 +1,11 @@
+# Tests for plotnetcfg
+- hosts: localhost
+  tags:
+  - classic
+  roles:
+  - role: standard-test-basic
+    required_packages:
+    - jq
+    tests:
+    - sanity-test:
+        run: plotnetcfg && plotnetcfg -f json | jq