TMT: account for environments on internal testing farm ranch

RHEL envs on the internal redhat testing farm ranch don't have any easy way
to install and enable the `epel-release` package.

Also, CentOS-Stream envs on the internal ranch have EPEL installed but
disabled.

This PR should account for both these envs. The tests on public ranch
should continue unaffected.

The packages required for testing have also been moved to the plan
preparation stage itself.

Signed-off-by: Lokesh Mandvekar <[email protected]>

plans/main.fmf

@@ -3,14 +3,25 @@ discover:
 execute:
     how: tmt
 prepare:
-    - how: feature
-      epel: enabled
+    - when: distro == rhel
+      how: install
+      package: https://dl.fedoraproject.org/pub/epel/epel-release-latest-$(rpm --eval '%{?rhel}').noarch.rpm
+      order: 5
+    - when: distro == centos-stream or distro == rhel
+      how: shell
+      script: dnf -y config-manager --set-enabled epel
+      order: 10
     - when: initiator == packit
-      because: "We need to test with updated packages from rhcontainerbot/podman-next copr"
       how: shell
       script: |
         sed -i -n '/^priority=/!p;$apriority=1' /etc/yum.repos.d/*podman-next*.repo
         dnf -y upgrade --allowerasing
+      order: 20
+    - how: install
+      package:
+        - bats
+        - crun
+        - podman-tests
 
 /upstream:
     summary: Run crun specific Podman system tests on upstream PRs

tests/tmt/podman/system-test.fmf

@@ -1,10 +1,3 @@
-require:
-    - bats
-    - conmon
-    - crun
-    - make
-    - podman-tests
-
 adjust:
     duration: 10m
     when: arch == aarch64

tests/tmt/sanity/main.fmf

@@ -1,4 +1,3 @@
-require: [crun, podman]
 summary: Sanity test for crun
 tag: ['upstream', 'downstream']
 test: bash ./runtest.sh