Re-enabled graph tests (#736)

* enabled graph tests
* joined multi and single process CI testing

[ROCm/rccl commit: cf8cfa88a8]

projects/rccl/test/AllToAllVTests.cpp

@@ -109,7 +109,7 @@ namespace RcclUnitTesting
   }
 
 
-  TEST(AllToAllv, DISABLED_OutOfPlaceGraph)
+  TEST(AllToAllv, OutOfPlaceGraph)
   {
     TestBed testBed;