[Test] Use DUMP_EXTERNAL_CLASS instead of invalid DUMP_DEPENDENCIES directive in ir text tests

compiler/testData/ir/irText/stubs/builtinMap.kt

@@ -1,6 +1,5 @@
-// !DUMP_DEPENDENCIES
 // WITH_STDLIB
 // FULL_JDK
 
 fun <K1, V1> Map<out K1, V1>.plus(pair: Pair<K1, V1>): Map<K1, V1> =
-        if (this.isEmpty()) mapOf(pair) else LinkedHashMap(this).apply { put(pair.first, pair.second) }
+        if (this.isEmpty()) mapOf(pair) else LinkedHashMap(this).apply { put(pair.first, pair.second) }