fix: use centos-stream-9 target instead of epel-9

Use the centos-stream-9 target as the epel-9 repos
don't seem to be up to date.

Remove the preparation steps enabling the copr repo
and installing the copr packages because it's not needed
and it's causing problems: Packit is supposed to enable the
copr repo and install all the packages contained in
that repo.

Signed-off-by: Miguel Martín <[email protected]>

.packit.yaml

@@ -30,7 +30,7 @@ jobs:
       job: copr_build
       trigger: pull_request
       targets:
-          epel-9: {}
+          centos-stream-9: {}
           fedora-latest-stable: {}
           fedora-latest: {}
           fedora-rawhide: {}
@@ -44,7 +44,7 @@ jobs:
       fmf_path: test/fmf
       tmt_plan: plans/onboarding
       targets:
-          epel-9: {}
+          centos-stream-9: {}
           fedora-latest-stable: {}
           fedora-latest: {}
           fedora-rawhide: {}

test/fmf/plans/onboarding.fmf

@@ -4,10 +4,8 @@ discover:
 execute:
     how: tmt
 prepare:
-    - how: install
-      copr: ${PACKIT_COPR_PROJECT}
     - how: shell
-      script: dnf install -y ${PACKIT_COPR_RPMS} postgresql-server sqlite
+      script: dnf install -y postgresql-server sqlite
 provision:
     how: virtual
     memory: 4096