Packit: enable downstream sync to CentOS Stream 10

This commit enables downstream syncing to CentOS Stream 10. The centos
maintainer will need to run `packit propose-downstream` and `centpkg
build` until better centos integration is in place.

The copr jobs have been split distro-wise so that Fedora and CentOS
builds / tests can still be triggered automatically regardless of PR
author's access to the repo, while only the RHEL jobs will need manual
triggering.

EL8 jobs have also been deleted as CentOS Stream 8 will go EOL end of
May and no further updates are expected to be shipped there.

Signed-off-by: Lokesh Mandvekar <lsm5@redhat.com>

Author: lsm5

.packit.yaml

@@ -2,13 +2,24 @@
 # See the documentation for more information:
 # https://packit.dev/docs/configuration/
 
-specfile_path: rpm/conmon.spec
+downstream_package_name: conmon
 upstream_tag_template: v{version}
 
+packages:
+  conmon-fedora:
+    pkg_tool: fedpkg
+    specfile_path: rpm/conmon.spec
+  conmon-centos:
+    pkg_tool: centpkg
+    specfile_path: rpm/conmon.spec
+  conmon-rhel:
+    specfile_path: rpm/conmon.spec
+
 jobs:
   - job: copr_build
     trigger: pull_request
-    notifications:
+    packages: [conmon-fedora]
+    notifications: &copr_build_failure_notification
       failure_comment:
         message: "Ephemeral COPR build failed. @containers/packit-build please check."
     enable_net: true
@@ -17,10 +28,26 @@ jobs:
       - fedora-all-x86_64
       - fedora-eln-aarch64
       - fedora-eln-x86_64
+
+  - job: copr_build
+    trigger: pull_request
+    packages: [conmon-centos]
+    notifications: *copr_build_failure_notification
+    enable_net: true
+    targets:
+      - centos-stream-10-aarch64
+      - centos-stream-10-x86_64
+      - centos-stream-9-aarch64
+      - centos-stream-9-x86_64
+
+  - job: copr_build
+    trigger: pull_request
+    packages: [conmon-rhel]
+    notifications: *copr_build_failure_notification
+    enable_net: true
+    targets:
       - epel-9-aarch64
       - epel-9-x86_64
-      - epel-8-aarch64
-      - epel-8-x86_64
 
   # Run on commit to main branch
   - job: copr_build
@@ -33,12 +60,22 @@ jobs:
     project: podman-next
     enable_net: true
 
+  # Downstream sync for Fedora
   - job: propose_downstream
     trigger: release
+    packages: [conmon-fedora]
     update_release: false
     dist_git_branches:
       - fedora-all
 
+  # Downstream sync for CentOS Stream
+  - job: propose_downstream
+    trigger: release
+    packages: [conmon-centos]
+    update_release: false
+    dist_git_branches:
+      - c10s
+
   - job: koji_build
     trigger: commit
     dist_git_branches: