lowering: don't reverse handler order in `(pop-handler-list ...)` (#55871)
We were accidentally emitting a different pop order for `Expr(:leave,
...)` if you uncomment the `nothing` below:
```julia
let src = Meta.@lower let
try
try
return 1
catch
end
finally
# nothing # <- uncomment me
end
end
println.(filter(stmt->Base.isexpr(stmt, :leave), src.args[1].code))
nothing
end
```