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

idea/idea-core/build.gradle.kts

@@ -16,6 +16,7 @@ dependencies {
     compile(project(":compiler:util"))
     compile(project(":idea:ide-common"))
     compile(project(":idea:idea-jps-common"))
+    compile(project(":idea:idea-frontend-independent"))
     compile(project(":kotlin-util-klib-metadata"))
     compile(project(":plugins:android-extensions-compiler"))
     compile(project(":kotlin-scripting-compiler-impl"))

idea/idea-core/src/org/jetbrains/kotlin/idea/core/Utils.kt

@@ -1,5 +1,5 @@
 /*
- * Copyright 2010-2019 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * 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.
  */
 
@@ -158,8 +158,6 @@ fun KtCallableDeclaration.canOmitDeclaredType(initializerOrBodyExpression: KtExp
     return canChangeTypeToSubtype && expressionType.isSubtypeOf(declaredType)
 }
 
-fun String.unquote(): String = KtPsiUtil.unquoteIdentifier(this)
-
 fun FqName.quoteSegmentsIfNeeded(): String {
     return pathSegments().joinToString(".") { it.asString().quoteIfNeeded() }
 }

idea/idea-core/src/org/jetbrains/kotlin/idea/core/psiModificationUtils.kt

@@ -1,5 +1,5 @@
 /*
- * Copyright 2010-2019 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * 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.
  */
 
@@ -45,14 +45,6 @@ import org.jetbrains.kotlin.types.typeUtil.isTypeParameter
 import org.jetbrains.kotlin.utils.KotlinExceptionWithAttachments
 import org.jetbrains.kotlin.utils.SmartList
 
-inline fun <reified T : PsiElement> PsiElement.replaced(newElement: T): T {
-    val result = replace(newElement)
-    return result as? T ?: (result as KtParenthesizedExpression).expression as T
-}
-
-@Suppress("UNCHECKED_CAST")
-fun <T : PsiElement> T.copied(): T = copy() as T
-
 fun KtLambdaArgument.moveInsideParentheses(bindingContext: BindingContext): KtCallExpression {
     val ktExpression = this.getArgumentExpression()
         ?: throw KotlinExceptionWithAttachments("no argument expression for $this")