FIR: introduce callable member symbols & initial member scopes

Initial member scopes cover top-level, class-level, and  supers

Ad-hock version of call resolve was introduced to test them
NB: after this commit, total Kotlin resolve test cannot finish
because of scope problems in type resolve transformer

Related to KT-24078
#KT-24083 Fixed

compiler/fir/cones/src/org/jetbrains/kotlin/fir/symbols/Callables.kt

@@ -0,0 +1,37 @@
+/*
+ * Copyright 2010-2019 JetBrains s.r.o. 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.fir.symbols
+
+import org.jetbrains.kotlin.fir.types.ConeKotlinType
+import org.jetbrains.kotlin.name.FqName
+import org.jetbrains.kotlin.name.Name
+
+// NB: with className == null we are at top level
+data class CallableId(val packageName: FqName, val className: FqName?, val callableName: Name) {
+    constructor(packageName: FqName, callableName: Name): this(packageName, null, callableName)
+
+    override fun toString(): String {
+        return buildString {
+            append(packageName.asString().replace('.', '/'))
+            append("/")
+            if (className != null) {
+                append(className)
+                append(".")
+            }
+            append(callableName)
+        }
+    }
+}
+
+interface ConeCallableSymbol : ConeSymbol {
+    val callableId: CallableId
+}
+
+interface ConePropertySymbol : ConeCallableSymbol
+
+interface ConeFunctionSymbol : ConeCallableSymbol {
+    val parameters: List<ConeKotlinType>
+}