Add RPM package publishing (#56797) (#57162)

Just tested deb publishing, and confirmed it works. Noticed that RPM packages aren't published though
It's the exact same step, targetting the RPM files instead
Both steps will run in parallel

Co-authored-by: dsotirakis <dimitrios.sotirakis@grafana.com>
(cherry picked from commit 44ad4ec9d4)

Co-authored-by: Julien Duchesne <julien.duchesne@grafana.com>

scripts/drone/events/release.star

@@ -390,7 +390,8 @@ def publish_packages_pipeline():
         compile_build_cmd(),
         publish_packages_step(edition='oss', ver_mode='release'),
         publish_grafanacom_step(edition='oss', ver_mode='release'),
-        publish_linux_packages_step(edition='oss'),
+        publish_linux_packages_step(edition='oss', package_manager='deb'),
+        publish_linux_packages_step(edition='oss', package_manager='rpm'),
     ]
 
     enterprise_steps = [
@@ -398,7 +399,8 @@ def publish_packages_pipeline():
         compile_build_cmd(),
         publish_packages_step(edition='enterprise', ver_mode='release'),
         publish_grafanacom_step(edition='enterprise', ver_mode='release'),
-        publish_linux_packages_step(edition='enterprise'),
+        publish_linux_packages_step(edition='enterprise', package_manager='deb'),
+        publish_linux_packages_step(edition='enterprise', package_manager='rpm'),
     ]
     deps = [
         'publish-artifacts-public',