fmf: Uninstall cockpit-packagekit for basic and network plans

These plans are not meant to have cockpit-packagekit installed. That
isn't in the test dependency list, but dnf installs "missing" weak
dependencies on upgrades by default, which is undesired: The packagekit
page gets preloaded and thus influences the test outcome, particularly
when it is an old version (as happens during downstream gating).

So remove the package again if it got installed for plans other than
"optional" (which is the one that actually tests packagekit).

Fixes https://gitlab.com/redhat/centos-stream/rpms/cockpit/-/merge_requests/68

test/browser/browser.sh

@@ -43,6 +43,11 @@ if grep -q 'ID=.*fedora' /etc/os-release && [ "$PLAN" = "basic" ]; then
     dnf install -y abrt abrt-addon-ccpp reportd libreport-plugin-bugzilla libreport-fedora
 fi
 
+# dnf installs "missing" weak dependencies, but we don't want them for plans other than "optional"
+if [ "$PLAN" != "optional" ] && rpm -q cockpit-packagekit; then
+    dnf remove -y cockpit-packagekit
+fi
+
 if grep -q 'ID=.*rhel' /etc/os-release; then
     # required by TestUpdates.testKpatch, but kpatch is only in RHEL
     dnf install -y kpatch kpatch-dnf