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

compiler/testData/loadJava/compiledJava/sam/Comparator.fir.txt

@@ -1,6 +1,4 @@
 public abstract interface Comparator<T : R|ft<kotlin/Any, kotlin/Any?>!|> : R|kotlin/Any| {
     public abstract fun compare(o1: R|ft<T, T?>!|, o2: R|ft<T, T?>!|): R|kotlin/Int|
 
-    public abstract operator fun equals(obj: R|kotlin/Any?|): R|kotlin/Boolean|
-
 }

compiler/testData/loadJava/compiledJava/sam/InterfaceWithObjectMethod.fir.txt

@@ -1,4 +1,2 @@
 public abstract interface InterfaceWithObjectMethod : R|kotlin/Any| {
-    public abstract fun toString(): R|kotlin/String|
-
 }