This reverts commit a01ac7cb.

Reason for revert: Causes flakes on gc stress:
https://build.chromium.org/p/client.v8/builders/V8%20Linux64%20GC%20Stress%20-%20custom%20snapshot/builds/14218

Original change's description:
> Replacing pc with trampoline on stack
> 
> This CL is the follow up of https://chromium-review.googlesource.com/c/586707/
> which used to crash when running the gc-stress bots. 
> It seems to be working now. We now keep the trampoline PC in the Safepoint 
> table and use that information to find SafepointEntries.
> 
> There's some refactoring that can be done, such as changing the code for 
> exceptions in a similar way and removing the trampoline from the 
> DeoptimizationInputData. Will take care of this in the next CL.
> 
> Bug: v8:6563
> Change-Id: I02565297093620023a1155b55d76a4dafcb54794
> Reviewed-on: https://chromium-review.googlesource.com/593622
> Commit-Queue: Juliana Patricia Vicente Franco <jupvfranco@google.com>
> Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
> Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#47030}

TBR=jarin@chromium.org,bmeurer@chromium.org,jupvfranco@google.com

Change-Id: Ie9929c9acae321a91014b76b9008f8835313e67d
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:6563
Reviewed-on: https://chromium-review.googlesource.com/595927Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47038}