Only configure systest CMake with framework

RE #34850

Author: cailafinn

CMakeLists.txt

@@ -179,6 +179,8 @@ endif()
 
 if(BUILD_MANTIDFRAMEWORK)
   add_subdirectory(scripts)
+  add_subdirectory(Testing/SystemTests/scripts)
+  add_subdirectory(Testing/SystemTests/tests)
 endif()
 
 # Docs requirements
@@ -203,10 +205,6 @@ if(ENABLE_DOCS)
   add_subdirectory(docs)
 endif()
 
-# System test targets
-add_subdirectory(Testing/SystemTests/scripts)
-add_subdirectory(Testing/SystemTests/tests)
-
 if(COVERAGE)
   get_property(ALL_SRCS GLOBAL PROPERTY COVERAGE_SRCS)
   set(SRCS_FILE "")