Add gating

Install postgresql-test-rpm-macros directly as it is not shipped

.fmf/version

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+1

gating.yaml

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+--- !Policy
+product_versions:
+  - rhel-*
+decision_context: osci_compose_gate
+rules:
+  - !PassingTestCaseRule {test_case_name: osci.brew-build.tier0.functional}

plan.fmf

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+execute:
+  how: tmt
+
+environment:
+  pybasever: '3.14'
+
+prepare+:
+  - how: shell
+    script: useradd testuser
+
+discover:
+  how: shell
+  dist-git-source: true
+  tests:
+  - name: bundled tests
+    test: |
+      # package is built but not shipped on c10s, postgresql16 is the srpm
+      dnf install -y "https://kojihub.stream.centos.org/kojifiles/vol/koji02/packages/postgresql16/$(rpm -q postgresql-server --qf '%{version}/%{release}/noarch/postgresql-test-rpm-macros-%{version}-%{release}.noarch.rpm')"
+
+      chmod a+Xw -R $TMT_SOURCE_DIR &&
+      runuser testuser --preserve-environment -c '
+        cd $(dirname $TMT_SOURCE_DIR/psycopg2-*/tests) &&
+
+        export PGTESTS_LOCALE=C.UTF-8 &&
+        . "/usr/share/postgresql-setup/postgresql_pkg_tests.sh" &&
+        pgtests_start &&
+
+        export PSYCOPG2_TESTDB=${PGTESTS_DATABASES##*:} &&
+        export PSYCOPG2_TESTDB_HOST=$PGHOST &&
+        export PSYCOPG2_TESTDB_PORT=$PGPORT &&
+
+        python${pybasever} -c "import tests; tests.unittest.main(defaultTest=\"tests.test_suite\")" --verbose
+      ' &&
+      chmod a+Xw -R $TMT_SOURCE_DIR
+
+    require:
+    - python${pybasever}-psycopg2
+    - python${pybasever}
+    - postgresql16-server