ci: run old testsuite by testing farm

testing-farm/plans/old-testsuite.fmf

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+---
+summary: run the old testsuite in Fedora Testing Farm
+discover:
+  - how: fmf
+    filter: "tag: old_testsuite"
+
+prepare:
+  - how: ansible
+    playbook: mock/integration-tests/setup-playbook/play-tf.yml
+
+execute:
+  - how: tmt

testing-farm/tests/old-testsuite/main.fmf

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+---
+summary: Execute the old testsuite started wit make
+test: ./test.sh
+tag: old_testsuite
+duration: 2h
+
+require:
+  - type: file
+    # copy-paste the whole directory
+    pattern: /

testing-farm/tests/old-testsuite/test.sh

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+#!/bin/sh -eux
+
+cd ../../../mock
+install-mock-packages-built-by-packit mock-core-configs mock
+make check 2>&1 | tee the-log | grep -e ^PASS -e ^FAIL -e ^ERROR