[JS IR] Improve debug info precision for blocks

Namely:
- Generate debug info for closing braces, which allows the breakpoints
  set on closing braces to be hit
- Generate debug info for 'if' and 'try/catch' statements.

KT-46276

compiler/testData/debug/stepping/enum.kt

@@ -55,11 +55,15 @@ fun box() {
 // EXPECTATIONS JS_IR
 // test.kt:22 box
 // test.kt:11 <init>
+// test.kt:3 <init>
 // test.kt:11 <init>
+// test.kt:3 <init>
 // test.kt:22 box
 // test.kt:9 foo
-// test.kt:7 E$foo$lambda
 // test.kt:15 E2_initEntries
 // test.kt:14 <init>
+// test.kt:14 <init>
 // test.kt:17 E2_initEntries
-// test.kt:14 <init>
+// test.kt:14 <init>
+// test.kt:14 <init>
+// test.kt:24 box