Generate proper exception table

Don't forget to split nested try blocks without finally block
 on generating finally blocks from outer ones.

 #KT-31923 InProgress

compiler/testData/codegen/box/finally/kt31923_continue.kt

@@ -0,0 +1,30 @@
+// !LANGUAGE: +ProperFinally
+// IGNORE_BACKEND_FIR: JVM_IR
+var result = ""
+
+fun test() {
+    for (z in 1..2) {
+        try {
+            try {
+                result += "try"
+                continue
+            } catch (fail: Throwable) {
+                result += "catch"
+            }
+        } finally {
+            result += " finally"
+            throw RuntimeException()
+        }
+    }
+}
+
+fun box(): String {
+    try {
+        test()
+        return "fail: expected exception"
+    } catch (e: RuntimeException) {
+
+    }
+
+    return if (result == "try finally") "OK" else "fail: $result"
+}