tests: pull tests from https://src.fedoraproject.org/tests/python-lit

Related: rhbz#2118319

tests/build-gating.fmf

@@ -18,17 +18,35 @@ adjust:
       and trigger != build
     enabled: false
 
-  - because: "When testing SCL-ized LLVM, the collection must be enabled first"
+  # Unfortunately, TMT does not support more declarative approach, we need to run commands on our own.
-    environment+:
+  - because: "On RHEL, CRB must be enabled to provide rarer packages"
-      WITH_SCL: "scl enable llvm-toolset-13.0 rust-toolset-1.58"
+    when: >-
-    when: "collection == llvm-toolset-13.0"
+      distro == rhel-9
+      or distro == rhel-8
+    prepare+:
+      - name: Enable CRB
+        how: shell
+        script: dnf config-manager --set-enabled rhel-CRB
+
+  - because: "On CentOS, CRB must be enabled to provide rarer packages"
+    when: >-
+      distro == centos
+    prepare+:
+      - name: Enable CRB
+        how: shell
+        script: dnf config-manager --set-enabled crb
 
 
 discover:
-  - name: "Upstream python-lit tests for build/PR gating"
+  - name: python-lit-upstream-tests
     how: fmf
-    url: https://src.fedoraproject.org/rpms/python-lit.git
+    url: https://src.fedoraproject.org/tests/python-lit.git
-    ref: rawhide
+    ref: main
+  - name: upstream-llvm-integration-testsuite
+    how: fmf
+    url: https://src.fedoraproject.org/tests/llvm.git
+    ref: main
+    test: integration-test-suite
 
 execute:
     how: tmt