Throw NPE instead of TypeCastException since 1.4

#KT-22275 In Progress

compiler/testData/codegen/box/casts/asThrowsNpe_1_4.kt

@@ -0,0 +1,13 @@
+// !API_VERSION: LATEST
+// TARGET_BACKEND: JVM
+
+fun box(): String {
+    val s: String? = null
+    try {
+        s as String
+        return "Fail: NPE should have been thrown"
+    } catch (e: Throwable) {
+        if (e::class != NullPointerException::class) return "Fail: exception class should be NPE: ${e::class}"
+        return "OK"
+    }
+}