[v5.4-rhel] Enable system tests on RHEL envs with TMT

.packit.yaml

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+---
+# See the documentation for more information:
+# https://packit.dev/docs/configuration/
+
+jobs:
+  - job: tests
+    trigger: pull_request
+    skip_build: true
+    use_internal_tf: true
+    notifications: &packit_failure_notification
+      failure_comment:
+        message: "Packit jobs failed. @containers/packit-build please check."
+    targets: &test_targets
+      epel-10-x86_64:
+        distros: [RHEL-10.0-Nightly]
+      epel-10-aarch64:
+        distros: [RHEL-10.0-Nightly]
+      epel-9-x86_64:
+        distros: [RHEL-9.6.0-Nightly]
+      epel-9-aarch64:
+        distros: [RHEL-9.6.0-Nightly]
+    tmt_plan: "/plans/system/root-local"
+    identifier: "sys-local-root"
+
+  - job: tests
+    trigger: pull_request
+    skip_build: true
+    use_internal_tf: true
+    notifications: *packit_failure_notification
+    targets: *test_targets
+    tmt_plan: "/plans/system/rootless-local"
+    identifier: "sys-local-rootless"
+
+  - job: tests
+    trigger: pull_request
+    skip_build: true
+    use_internal_tf: true
+    notifications: *packit_failure_notification
+    targets: *test_targets
+    tmt_plan: "/plans/system/root-remote"
+    identifier: "sys-remote-root"
+
+  - job: tests
+    trigger: pull_request
+    skip_build: true
+    use_internal_tf: true
+    notifications: *packit_failure_notification
+    targets: *test_targets
+    tmt_plan: "/plans/system/rootless-remote"
+    identifier: "sys-remote-rootless"

plans/system.fmf

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+discover:
+    how: fmf
+
+execute:
+    how: tmt
+
+prepare:
+    - name: build and test dependencies
+      how: install
+      package:
+        - bzip2
+        - go-md2man
+        - golang
+        - gpgme-devel
+        - libseccomp-devel
+        - netavark
+        - podman-catatonit
+        # podman-tests used only to fetch test dependencies
+        - podman-tests
+        - slirp4netns
+        - systemd-devel
+      order: 5
+    - how: shell
+      script: modprobe null_blk nr_devices=1
+      order: 5
+    - how: shell
+      script: |
+        # Install bats
+        # https://bats-core.readthedocs.io/en/stable/installation.html
+        BATS_VERSION=1.12.0
+        curl -L https://github.com/bats-core/bats-core/archive/refs/tags/v"$BATS_VERSION".tar.gz | tar -xz
+        pushd bats-core-"$BATS_VERSION"
+        ./install.sh /usr
+        popd
+        rm -rf bats-core-"$BATS_VERSION"
+        # Install parallel
+        # https://cgit.git.savannah.gnu.org/cgit/parallel.git/tree/README
+        wget https://ftpmirror.gnu.org/parallel/parallel-20250522.tar.bz2
+        bzip2 -dc parallel-20250522.tar.bz2 | tar xvf -
+        pushd parallel-20250522
+        ./configure && make && make install
+        popd
+      order: 10
+
+provision:
+    how: artemis
+    hardware:
+        memory: ">= 16 GB"
+        cpu:
+            cores: ">= 4"
+            threads: ">=8"
+        disk:
+            - size: ">= 512 GB"
+
+/root-local:
+    summary: Local root system tests
+    discover+:
+        test: /test/tmt/sys-root-local
+
+/rootless-local:
+    summary: Local rootless system tests
+    discover+:
+        test: /test/tmt/sys-rootless-local
+
+/root-remote:
+    summary: Remote root system tests
+    discover+:
+        test: /test/tmt/sys-root-remote
+
+/rootless-remote:
+    summary: Remote rootless system tests
+    discover+:
+        test: /test/tmt/sys-rootless-remote