FIR: Do not load hashCode/toString/equals methods from Java interface

As it's done in FE 1.0, and there are subtle semantics in the language that depends on it

core/compiler.common.jvm/src/org/jetbrains/kotlin/load/java/structure/javaLoading.kt

@@ -0,0 +1,34 @@
+/*
+ * 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.load.java.structure
+
+
+fun JavaMember.isObjectMethodInInterface(): Boolean {
+    return containingClass.isInterface && this is JavaMethod && isObjectMethod(this)
+}
+
+private fun isObjectMethod(method: JavaMethod): Boolean {
+    return when (method.name.asString()) {
+        "toString", "hashCode" -> {
+            method.valueParameters.isEmpty()
+        }
+        "equals" -> {
+            isMethodWithOneObjectParameter(method)
+        }
+        else -> false
+    }
+}
+
+private fun isMethodWithOneObjectParameter(method: JavaMethod): Boolean {
+    val parameters = method.valueParameters
+    val type = parameters.singleOrNull()?.type as? JavaClassifierType ?: return false
+    val classifier = type.classifier
+    if (classifier is JavaClass) {
+        val classFqName = classifier.fqName
+        return classFqName != null && classFqName.asString() == "java.lang.Object"
+    }
+    return false
+}