FIR IDE: Make KtReference class descriptors frontend independent

* The new idea-frontend-independent module created
* Moved KtReference and it inheritors to that module & implement them in idea-analysis module by using descriptors frontend

core/util.runtime/src/org/jetbrains/kotlin/utils/addToStdlib.kt

@@ -1,17 +1,6 @@
 /*
- * Copyright 2010-2015 JetBrains s.r.o.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * Copyright 2010-2020 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
  */
 
 package org.jetbrains.kotlin.utils.addToStdlib
@@ -50,6 +39,17 @@ inline fun <reified T> Array<*>.firstIsInstance(): T {
     throw NoSuchElementException("No element of given type found")
 }
 
+inline fun <reified T> Iterable<*>.filterIsInstanceWithChecker(additionalChecker: (T) -> Boolean): List<T> {
+    val result = arrayListOf<T>()
+    for (element in this) {
+        if (element is T && additionalChecker(element)) {
+            result += element
+        }
+    }
+    return result
+}
+
+
 inline fun <reified T : Any> Iterable<*>.lastIsInstanceOrNull(): T? {
     when (this) {
         is List<*> -> {