Move foreign annotation tests into diagnostics folder

compiler/testData/diagnostics/foreignAnnotationsTests/tests/lombokSimple.kt

@@ -0,0 +1,19 @@
+// !DIAGNOSTICS: -UNUSED_VARIABLE -UNUSED_PARAMETER
+
+// FILE: A.java
+import lombok.*;
+
+public class A {
+    @NonNull
+    public String foo(@NonNull String x) {
+        return "";
+    }
+
+}
+
+// FILE: main.kt
+fun main(a: A) {
+    a.foo("").length
+    a.foo("")<!UNNECESSARY_SAFE_CALL!>?.<!>length
+    a.foo(<!NULL_FOR_NONNULL_TYPE!>null<!>)<!UNNECESSARY_SAFE_CALL!>?.<!>length
+}