static interface methods completion: forbid on instance members, inheritors (IDEA-107794)

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/lambda/completion/normal/SelfStaticsOnly.java

@@ -0,0 +1,14 @@
+interface Function<T, R> {
+  public R apply(T t);
+
+  static <K> Function<K, K> baz() {
+    return k -> k;
+  }
+}
+
+interface IFunction extends Function<Integer, Integer> {
+  static void bar() {}
+  static void ba() {
+    ba<caret>
+  }
+}