[TEST] Migrate AbstractDiagnosticsWithExplicitApi to new test runners

compiler/testData/diagnostics/tests/testsWithExplicitApi/constructors.kt

@@ -0,0 +1,17 @@
+// SKIP_TXT
+
+public class Foo1 () {}
+public class Foo2 constructor() {}
+public class Foo3 public constructor() {}
+public class Foo4 private constructor() {}
+
+public class Foo5 {
+    /**
+     * constructor KDoc
+     */
+    <!NO_EXPLICIT_VISIBILITY_IN_API_MODE!>constructor<!>() {}
+}
+
+public class Foo6 {
+    public constructor() {}
+}