sysupdate: move back to libexecdir to mark as experimental

Fixes https://github.com/systemd/systemd/issues/43498

src/sysupdate/meson.build

@@ -24,7 +24,7 @@ systemd_updatectl_sources = files(
 )
 
 executables += [
-        executable_template + {
+        libexec_template + {
                 'name' : 'systemd-sysupdate',
                 'public' : true,
                 'conditions' : ['ENABLE_SYSUPDATE'],
@@ -63,10 +63,3 @@ if conf.get('ENABLE_SYSUPDATED') == 1
         install_data('org.freedesktop.sysupdate1.policy',
                      install_dir : polkitpolicydir)
 endif
-
-if conf.get('ENABLE_SYSUPDATE') == 1
-        # symlink for backwards compatibility after rename
-        install_symlink('systemd-sysupdate',
-                        pointing_to : libexecdir_to_bin / 'systemd-sysupdate',
-                        install_dir : libexecdir)
-endif