add GPU resource allocation file for parallel testing via ctest

Signed-off-by: Karl W Schulz <karl.schulz@amd.com>

tests/4gpus.json

@@ -0,0 +1,24 @@
+{
+  "version": {
+    "major": 1,
+    "minor": 0
+  },
+  "local": [
+    {
+      "gpus": [
+        {
+            "id": "0",
+         },
+        {
+          "id": "1"
+         },
+        {
+          "id": "2"
+         },
+        {
+          "id": "3"
+         }
+      ]
+    }
+  ]
+}