Update test/CI configuration files

Add or refresh test configuration on rawhide:
- .fmf/version
- gating.yaml
- plans.fmf
- ci.fmf

.fmf/version

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+1

ci.fmf

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+resultsdb-testcase: separate

gating.yaml

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+--- !Policy
+product_versions:
+  - fedora-*
+decision_context: bodhi_update_push_testing
+subject_type: koji_build
+rules:
+  - !PassingTestCaseRule {test_case_name: fedora-ci.koji-build./plans/tier1-public.functional}
+
+#Rawhide
+--- !Policy
+product_versions:
+  - fedora-*
+decision_context: bodhi_update_push_stable
+subject_type: koji_build
+rules:
+  - !PassingTestCaseRule {test_case_name: fedora-ci.koji-build./plans/tier1-public.functional}
+
+#gating rhel
+--- !Policy
+product_versions:
+  - rhel-*
+decision_context: osci_compose_gate
+rules:
+  - !PassingTestCaseRule {test_case_name: osci.brew-build./plans/tier1-internal.functional}

plans.fmf

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+/tier1-internal:
+  plan:
+    import:
+      url: https://gitlab.com/redhat/centos-stream/tests/xsane.git
+      name: /plans/tier1/internal
+
+/tier1-public:
+  plan:
+    import:
+      url: https://gitlab.com/redhat/centos-stream/tests/xsane.git
+      name: /plans/tier1/public
+
+/tier2-tier3-internal:
+  plan:
+    import:
+      url: https://gitlab.com/redhat/centos-stream/tests/xsane.git
+      name: /plans/tier2-tier3/internal
+
+/tier2-tier3-public:
+  plan:
+    import:
+      url: https://gitlab.com/redhat/centos-stream/tests/xsane.git
+      name: /plans/tier2-tier3/public
+
+/others-internal:
+  plan:
+    import:
+      url: https://gitlab.com/redhat/centos-stream/tests/xsane.git
+      name: /plans/others/internal
+
+/others-public:
+  plan:
+    import:
+      url: https://gitlab.com/redhat/centos-stream/tests/xsane.git
+      name: /plans/others/public