This CL changes ToString of stack frames to optionally take a
IncrementalStringBuilder instance. Instead of using one instance per
frame when serializing a stack trace, a single instance is now used.

This improves local stack serialization micro benchmarks by ~6%.

R=jgruber@chromium.org

Bug: v8:8742
Change-Id: I067069f91919c167434979b4d9013019e46ed3b8
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1532063
Commit-Queue: Simon Zünd <szuend@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#60378}