tmt: Disable fedora repo for C10 tests

https://issues.redhat.com/browse/TFT-2564 roars its ugly head again and
completely breaks installation due to installing Fedora packages on
CentOS 10.

Move the cockpit-podman to procedural code after disabling that repo.

See containers/podman#24255

test/browser/browser.sh

@@ -3,6 +3,12 @@
 set -eux
 cd "${0%/*}/../.."
 
+# counteract https://issues.redhat.com/browse/TFT-2564 which breaks EVERYthing
+if grep -q 'platform:el10' /etc/os-release; then
+    rm -f --verbose /etc/yum.repos.d/fedora.repo
+fi
+dnf install -y cockpit-podman
+
 # HACK: ensure that critical components are up to date: https://github.com/psss/tmt/issues/682
 dnf update -y podman crun conmon criu
 

test/browser/main.fmf

@@ -1,6 +1,7 @@
 require:
   - systemd-container
-  - cockpit-podman
+  # install dynamically due to https://issues.redhat.com/browse/TFT-2564
+  # - cockpit-podman
   - cockpit-ws
   - cockpit-system
   - criu