Move load_matching_env.sh into subdir (ATDM)

This avoids having it sit in the source dir along side the load-env.sh script
so tab completion works better and it moves it out of the base build directory
to avoid confusion (because it is only for the install dir).

I tested this manually and it seems to do exactly what it is supposed to do.

cmake/std/atdm/ATDMDevEnvSettings.cmake

@@ -430,10 +430,10 @@ IF (COMMAND INSTALL AND NOT "${CMAKE_INSTALL_PREFIX}" STREQUAL "")
     CACHE STRING
     "Name of env var set to <CMAKE_INSTALL_PREFIX> set in installed script <ATDM_INSTALLED_ENV_LOAD_SCRIPT_NAME>." )
 
-  CONFIGURE_FILE( ${CMAKE_CURRENT_LIST_DIR}/load_matching_env.sh.in
-    ${CMAKE_CURRENT_BINARY_DIR}/load_matching_env.sh @ONLY )
+  CONFIGURE_FILE( ${CMAKE_CURRENT_LIST_DIR}/utils/load_matching_env.sh.in
+    ${CMAKE_CURRENT_BINARY_DIR}/cmake/std/atdm/utils/load_matching_env.sh @ONLY )
 
-  INSTALL( FILES ${CMAKE_CURRENT_BINARY_DIR}/load_matching_env.sh
+  INSTALL( FILES ${CMAKE_CURRENT_BINARY_DIR}/cmake/std/atdm/utils/load_matching_env.sh
     DESTINATION ${CMAKE_INSTALL_PREFIX}
     RENAME ${ATDM_INSTALLED_ENV_LOAD_SCRIPT_NAME} )