K2: Adjust JDK 21 test data to the latest JvmMappedScope changes

See 2e5b783cc6 for details

After the fix for KT-57694 (mostly rewritten JvmMappedScope),
the behavior of loading new JDK 21 members of K2 has been aligned with K1

compiler/testData/diagnostics/testsWithJdk21/newListMethods.fir.kt

@@ -1,46 +0,0 @@
-// ISSUE: KT-58371
-// WITH_STDLIB
-
-class A<T> : ArrayList<T>() {
-    override fun addFirst(t: T) {
-        super.addFirst(t)
-    }
-
-    override fun addLast(t: T) {
-        super.addLast(t)
-    }
-
-    override fun getFirst(): T = super.getFirst()
-    override fun getLast(): T = super.getLast()
-
-    override fun removeFirst(): T = super.removeFirst()
-    override fun removeLast(): T = super.removeLast()
-
-    <!NOTHING_TO_OVERRIDE!>override<!> fun reversed(): List<T> = super.<!UNRESOLVED_REFERENCE!>reversed<!>()
-}
-
-fun foo(x: MutableList<String>, y: ArrayList<String>, z: A<String>) {
-    x.<!UNRESOLVED_REFERENCE!>addFirst<!>("")
-    x.<!UNRESOLVED_REFERENCE!>addLast<!>("")
-    x.<!UNRESOLVED_REFERENCE!>getFirst<!>()
-    x.<!UNRESOLVED_REFERENCE!>getLast<!>()
-    x.<!DEBUG_INFO_CALL("fqName: kotlin.collections.removeFirst; typeCall: extension function")!>removeFirst()<!>
-    x.<!DEBUG_INFO_CALL("fqName: kotlin.collections.removeLast; typeCall: extension function")!>removeLast()<!>
-    x.<!DEBUG_INFO_CALL("fqName: kotlin.collections.reversed; typeCall: extension function")!>reversed()<!>
-
-    y.addFirst("")
-    y.addLast("")
-    y.getFirst()
-    y.getLast()
-    y.<!DEBUG_INFO_CALL("fqName: java.util.ArrayList.removeFirst; typeCall: function")!>removeFirst()<!>
-    y.<!DEBUG_INFO_CALL("fqName: java.util.ArrayList.removeLast; typeCall: function")!>removeLast()<!>
-    y.<!DEBUG_INFO_CALL("fqName: kotlin.collections.reversed; typeCall: extension function")!>reversed()<!>
-
-    z.addFirst("")
-    z.addLast("")
-    z.getFirst()
-    z.getLast()
-    z.<!DEBUG_INFO_CALL("fqName: A.removeFirst; typeCall: function")!>removeFirst()<!>
-    z.<!DEBUG_INFO_CALL("fqName: A.removeLast; typeCall: function")!>removeLast()<!>
-    z.<!DEBUG_INFO_CALL("fqName: A.reversed; typeCall: function")!>reversed()<!>
-}

compiler/testData/diagnostics/testsWithJdk21/newListMethods.kt

@@ -1,3 +1,4 @@
+// FIR_IDENTICAL
 // ISSUE: KT-58371
 // WITH_STDLIB