[Native][tests] Rename MemoryModel.DEFAULT to MemoryModel.LEGACY

native/native.tests/tests/org/jetbrains/kotlin/konan/blackboxtest/support/settings/TestProcessSettings.kt

@@ -90,10 +90,9 @@ internal enum class OptimizationMode(private val description: String, val compil
  */
 internal enum class MemoryModel(val compilerFlags: List<String>?) {
     /**
-     * TODO: rename DEFAULT to LEGACY. It was postponed, as it would require simultaneous change in teamcity configuration
      * but it should be done at some point.
      */
-    DEFAULT(listOf("-memory-model", "strict")),
+    LEGACY(listOf("-memory-model", "strict")),
     EXPERIMENTAL(listOf("-memory-model", "experimental"));
 
     override fun toString() = compilerFlags?.joinToString(prefix = "(", separator = " ", postfix = ")").orEmpty()