Do not generate @NotNull annotations on void- or primitive-returning methods

#KT-4834 Fixed
  #KT-5255 Fixed

compiler/testData/asJava/lightClasses/nullabilityAnnotations/IntOverridesAny.kt

@@ -0,0 +1,12 @@
+// C
+
+trait Tr {
+    fun foo(): Any
+    val v: Any
+}
+
+class C: Tr {
+    override fun foo() = 1
+    override val v = 1
+}
+