[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/whenWithInlineInCondition.kt

@@ -81,6 +81,7 @@ fun nop() {}
 // test.kt:22 box
 // test.kt:7 box
 // test.kt:7 box
+// test.kt:28 nop
 // test.kt:20 box
 // test.kt:12 box
 // test.kt:21 box
@@ -94,3 +95,5 @@ fun nop() {}
 // test.kt:25 box
 // test.kt:14 box
 // test.kt:14 box
+// test.kt:28 nop
+// test.kt:17 box