[ptr-compr][cleanup] Prepare for improving literals creation

Create[Array|Object]Literal were simply extracted from Helper
classes.

Bug: v8:9353
Change-Id: I8a97a7d5151c324db4a924cbfe1720444a1529aa
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1683992Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62474}