Drive-by fixes:
* categorize CodeDataContainer objects as kCode,
* when external code space is enabled report CodeDataContainers as
  (%s builtin handle),
* replace a sequence of obj.IsXXX() with a respective sequence of
  InstanceTypeChecker::IsXXX().

Bug: v8:11880
Change-Id: Ib50b168eb28af5f8388be7f9b9f4feba2ee784af
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3780534
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81898}