JetDiagnosticsTest migrated to TestGenerator

- test data files renamed from *.jet to *.kt

compiler/testData/diagnostics/tests/scopes/kt37.kt

@@ -0,0 +1,16 @@
+//KT-37 Typechecker doesn't complain about accessing non-public property
+package kt37
+
+class C() {
+    private var f: Int
+
+    {
+        f = 610
+    }
+}
+
+fun box(): String {
+    val c = C()
+    if (c.<!INVISIBLE_MEMBER!>f<!> != 610) return "fail"
+    return "OK"
+}