test/rgw/lua: install luarocks

since it is only a suggestion for debian.
this is a regression from: https://github.com/ceph/ceph/pull/60666

Fixes: https://tracker.ceph.com/issues/69473

Signed-off-by: Yuval Lifshitz <ylifshit@ibm.com>

debian/control

@@ -999,7 +999,8 @@ Depends: librados2 (= ${binary:Version}),
          liblua5.3-0,
          ${misc:Depends},
          ${shlibs:Depends},
-Suggests: luarocks,
+Suggests: liblua5.3-dev,
+          luarocks,
 Description: RADOS Gateway client library
  RADOS is a distributed object store used by the Ceph distributed
  storage system.  This package provides a REST gateway to the

qa/suites/rgw/lua/tasks/0-install.yaml

@@ -3,7 +3,7 @@ tasks:
 - ceph:
 - openssl_keys:
 - rgw: [client.0]
-- tox: [client.0]    
+- tox: [client.0]
 
 overrides:
   ceph:
@@ -11,3 +11,11 @@ overrides:
       global:
         osd_min_pg_log_entries: 10
         osd_max_pg_log_entries: 10
+  install:
+    ceph:
+      extra_system_packages:
+        rpm:
+        - luarocks
+        deb:
+        - liblua5.3-dev
+        - luarocks