MDEV-33723 Mroonga ignored WITHOUT_DYNAMIC_PLUGINS

Make WITHOUT_DYNAMIC_PLUGINS ignore mrooonga also in its own DIY version
of MYSQL_ADD_PLUGIN

storage/mroonga/CMakeLists.txt

@@ -57,6 +57,11 @@ if(MRN_BUNDLED)
       "${PLUGIN_MROONGA}" STREQUAL "NO")
     return()
   endif()
+  if(WITHOUT_DYNAMIC_PLUGINS)
+    if(NOT (PLUGIN_MROONGA STREQUAL STATIC))
+      return()
+    endif()
+  endif()
 endif()
 
 set(MRN_BUNDLED_GROONGA_RELATIVE_DIR "vendor/groonga")