[JVM IR] Ensure an instruction for the line number for a break.

This ensures that the debugger always has a bytecode offset for
the line number of a break/continue so that you step there and
so that you can set breakpoints there.

The `nop` instruction is optimized out if it has no line number
information.

^KT-46450 Fixed

compiler/testData/debug/localVariables/tryFinally12.kt

@@ -9,7 +9,7 @@ fun box(): String {
             } catch (e: Exception) {
                 val y = "y"
                 val z = "z"
-                continue  // TODO: why does the continue not have a line number so we stop here?
+                continue
             } finally {
                 throw RuntimeException("$i")
             }
@@ -32,5 +32,6 @@ fun box(): String {
 // test.kt:9 box: i:int=0:int
 // test.kt:10 box: i:int=0:int, e:java.lang.Exception=java.lang.RuntimeException
 // test.kt:11 box: i:int=0:int, e:java.lang.Exception=java.lang.RuntimeException, y:java.lang.String="y":java.lang.String
+// test.kt:12 box: i:int=0:int, e:java.lang.Exception=java.lang.RuntimeException, y:java.lang.String="y":java.lang.String, z:java.lang.String="z":java.lang.String
 // test.kt:14 box: i:int=0:int
 // test.kt:18 box: