AutoTest: Allow registering ITestTools

Task-number: QTCREATORBUG-23332
Change-Id: I529b1cc1f110739c264c7a021aada063f697b1db
Reviewed-by: David Schulz <david.schulz@qt.io>

src/plugins/autotest/itestframework.h

@@ -41,6 +41,13 @@ class TestTreeItem;
 class ITestBase
 {
 public:
+    enum TestBaseType
+    {
+        None      = 0x0,
+        Framework = 0x1,
+        Tool      = 0x2
+    };
+
     explicit ITestBase(bool activeByDefault);
     virtual ~ITestBase() = default;