Doing some refactoring to perfetto  build files. Rolling to
ensure that we are not breaking embedders in the process.

Cq-Include-Trybots: luci.v8.try:v8_linux64_perfetto_dbg_ng
Bug: v8:8339
Change-Id: I88ab30cc809779e36aa7e5c141e8180cd239edae
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1773274
Auto-Submit: Primiano Tucci <primiano@chromium.org>
Commit-Queue: Tamer Tas <tmrts@chromium.org>
Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Reviewed-by: Tamer Tas <tmrts@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63446}