fix: Restart rhsm service after installation

* Card ID: CCT-1027

Following the installation of the subscription-manager package, the dbus
service was not loaded as expected. This update addresses the problem by
ensuring that the dbus service is properly restarted after the
installation or upgrade process.

subscription-manager.spec

@@ -681,6 +681,8 @@ find %{buildroot} -name \*.py* -exec touch -r %{SOURCE0} '{}' \;
     %tmpfiles_create %{_tmpfilesdir}/subscription-manager.conf
 %else
     %systemd_post rhsmcertd.service
+    %systemd_post rhsm.service
+    systemctl restart rhsm.service
 %endif
 
 # When subscription-manager is upgraded on RHEL 8 (from RHEL 8.2 to RHEL 8.3), then kill