[JVM_IR] Recursively perform constant lowering.

Otherwise constants in child expressions are not transformed.

^KT-47716 Fixed.

compiler/testData/codegen/box/unsignedTypes/kt47716.kt

@@ -0,0 +1,12 @@
+// IGNORE_BACKEND: WASM
+// WITH_RUNTIME
+
+fun box(): String {
+    val r =
+        try {
+            ULong
+        } finally {
+            UInt.MAX_VALUE
+        }.MAX_VALUE
+    return if (r == ULong.MAX_VALUE) "OK" else "FAIL"
+}