Support covariant MutableMap.entries.remove in JS/IR

Workaround for KT-43321
Follow up to KT-41278

libraries/stdlib/js/src/kotlin/collections/AbstractMutableMap.kt

@@ -50,6 +50,8 @@ public actual abstract class AbstractMutableMap<K, V> protected actual construct
     internal abstract class AbstractEntrySet<E : Map.Entry<K, V>, K, V> : AbstractMutableSet<E>() {
         final override fun contains(element: E): Boolean = containsEntry(element)
         abstract fun containsEntry(element: Map.Entry<K, V>): Boolean
+        final override fun remove(element: E): Boolean = removeEntry(element)
+        abstract fun removeEntry(element: Map.Entry<K, V>): Boolean
     }
 
     actual override fun clear() {

libraries/stdlib/js/src/kotlin/collections/HashMap.kt

@@ -32,7 +32,7 @@ public actual open class HashMap<K, V> : AbstractMutableMap<K, V>, MutableMap<K,
 
         override operator fun iterator(): MutableIterator<MutableEntry<K, V>> = internalMap.iterator()
 
-        override fun remove(element: MutableEntry<K, V>): Boolean {
+        override fun removeEntry(element: Map.Entry<K, V>): Boolean {
             if (contains(element)) {
                 this@HashMap.remove(element.key)
                 return true

libraries/stdlib/js/src/kotlin/collections/LinkedHashMap.kt

@@ -90,7 +90,7 @@ public actual open class LinkedHashMap<K, V> : HashMap<K, V>, MutableMap<K, V> {
 
         override operator fun iterator(): MutableIterator<MutableEntry<K, V>> = EntryIterator()
 
-        override fun remove(element: MutableEntry<K, V>): Boolean {
+        override fun removeEntry(element: Map.Entry<K, V>): Boolean {
             checkIsMutable()
             if (contains(element)) {
                 this@LinkedHashMap.remove(element.key)