LibJS: Save scheduled jumps when entering unwind contexts

These are then restored upon `ContinuePendingUnwind`.
This stops us from forgetting where we needed to jump when we do extra
try-catches in finally blocks.

Co-Authored-By: Jesús "gsus" Lapastora <cyber.gsuscode@gmail.com>

Userland/Libraries/LibJS/Bytecode/BasicBlock.h

@@ -15,7 +15,6 @@ namespace JS::Bytecode {
 
 struct UnwindInfo {
     Executable const* executable;
-
     JS::GCPtr<Environment> lexical_environment;
 
     bool handler_called { false };