KT-11890 Completion for callable references does not propose static Java members

#KT-11890 Fixed

idea/ide-common/src/org/jetbrains/kotlin/idea/codeInsight/ReferenceVariantsHelper.kt

@@ -235,6 +235,11 @@ class ReferenceVariantsHelper(
             descriptors.addNonExtensionMembers(listOf(type), kindFilter, nameFilter, constructorFilter = { true })
 
             descriptors.addScopeAndSyntheticExtensions(resolutionScope, listOf(type), CallType.CALLABLE_REFERENCE, kindFilter, nameFilter)
+
+            val staticScope = (type.constructor.declarationDescriptor as? ClassDescriptor)?.staticScope
+            if (staticScope != null) {
+                descriptors.addAll(staticScope.getDescriptorsFiltered(kindFilter, nameFilter))
+            }
         }
         else {
             // process non-instance members and class constructors

idea/idea-completion/testData/basic/multifile/JavaCallableReference/JavaCallableReference.java

@@ -0,0 +1,3 @@
+public final class JavaCallableReference {
+    public static void foo(){}
+}

idea/idea-completion/testData/basic/multifile/JavaCallableReference/JavaCallableReference.kt

@@ -0,0 +1,6 @@
+fun main(args: Array<String>) {
+    val f = JavaCallableReference::<caret>
+}
+
+// INVOCATION_COUNT: 1
+// EXIST: foo

idea/idea-completion/tests/org/jetbrains/kotlin/idea/completion/test/MultiFileJvmBasicCompletionTestGenerated.java

@@ -161,6 +161,12 @@ public class MultiFileJvmBasicCompletionTestGenerated extends AbstractMultiFileJ
         doTest(fileName);
     }
 
+    @TestMetadata("JavaCallableReference")
+    public void testJavaCallableReference() throws Exception {
+        String fileName = KotlinTestUtils.navigationMetadata("idea/idea-completion/testData/basic/multifile/JavaCallableReference/");
+        doTest(fileName);
+    }
+
     @TestMetadata("JavaInnerClasses")
     public void testJavaInnerClasses() throws Exception {
         String fileName = KotlinTestUtils.navigationMetadata("idea/idea-completion/testData/basic/multifile/JavaInnerClasses/");