This CL adds all fields to StackFrameInfo that are necessary to
stringify a stack trace frame. This is another step towards
disentangling symbolizing and serializing:

  - Symbolization collects all the necessary strings, numbers and
    flags for a stack trace frame.
  - Serialization turns the symbolized stack trace frame into a
    string.

Drive-by: Moves the lazy initialization of StackFrameInfo into the
private getter.

Bug: v8:8742
Change-Id: Ic3e0fb6b3d0f0e260014af44380f1f30216b1b26
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1627346Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Simon Zünd <szuend@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61784}