Revert of Sampling heap profiler data structure changes (patchset #10 id:180001 of https://codereview.chromium.org/1697903002/ )

Reason for revert:
[Sheriff] Speculative revert for cpu profiler crashes on chromebooks:
https://build.chromium.org/p/client.v8/builders/V8%20Arm%20-%20debug/builds/549
https://build.chromium.org/p/client.v8/builders/V8%20Arm%20-%20debug/builds/550

Original issue's description:
> Sampling heap profiler data structure changes
>
> Previously, the sampling heap profiler stored a list of samples and then
> built a tree representation when the profile was queried by calling
> GetAllocationProfile. This change reduces duplication by removing stacks
> from all samples. Also, less information is stored in the tree
> maintained by the profiler and remaining information (script name, line
> no, etc) is resolved when a profile is requested.
>
> BUG=
>
> Committed: https://crrev.com/cdd55e2a3717723492d76f66810bf56b8de7f198
> Cr-Commit-Position: refs/heads/master@{#34119}

TBR=ofrobots@google.com,ulan@chromium.org,hpayer@chromium.org,mattloring@google.com
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=

Review URL: https://codereview.chromium.org/1708363002

Cr-Commit-Position: refs/heads/master@{#34128}