K2 ignore return type on special java funs overrides

#KT-62197 fixed

compiler/testData/diagnostics/tests/j+k/kt62197.kt

@@ -0,0 +1,35 @@
+// FIR_IDENTICAL
+// FILE: main.kt
+
+fun main() {
+    MutableLong().toLong()
+}
+
+// FILE: MutableLong.java
+public class MutableLong extends Number {
+
+    private long value;
+
+    public MutableLong() {
+    }
+
+    public int intValue() {
+        return (int)this.value;
+    }
+
+    public long longValue() {
+        return this.value;
+    }
+
+    public float floatValue() {
+        return (float)this.value;
+    }
+
+    public double doubleValue() {
+        return (double)this.value;
+    }
+
+    public Long toLong() {
+        return this.longValue();
+    }
+}