deprecate testing_is_PIN2_used()

Author: jmlapre

src/sst/core/testingframework/sst_unittest_support.py

@@ -136,6 +136,10 @@ def testing_is_PIN_Compiled():
     return rtn
 
 def testing_is_PIN2_used():
+    from warnings import warn
+    warn("testing_is_PIN2_used() is deprecated and will be removed in future versions of SST.",
+        DeprecationWarning, stacklevel=2)
+
     global pin_exec_path
     if testing_is_PIN_Compiled():
         if "/pin.sh" in pin_exec_path: