Compiling Sparkplug on the heap saved 10% of the CompileBaseline
RCS metric, but that came with too much code complexity.
Since in the end that corresponds to < 1% of the entire compilation
time, we decided to revert this project.

This reverts:
commit e29b2ae4
commit d1f2a83b
commit 4666e182
commit a1147408
commit e0d4254f
commit 9ab8422d
commit a3b24ecc
commit 1eb87706
commit fe5c9dfd
commit 7ac3b55a
commit 7e95f30e
commit 323b5962
commit 6bf0b704
commit e82b368b
commit 5020d83e
commit 642a4673
commit ec7b99d5
commit fb4f89ae
commit 208854bb
commit 63be6dde

Bug: v8:12158
Change-Id: I9f2539be6c7d80c6e243c9ab173e3c5bb0dff97d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3136453
Auto-Submit: Victor Gomes <victorgomes@chromium.org>
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/main@{#77319}