trigger persistenced in cos-extensions and not in the gpu-installer

This reverts the change where persistenced was moved to be triggered from the cos-gpu-installer.
This causes issues on GB300. Probably because of the very slow boot on bare-metal.

This CL reverts the logic for persistenced done in these CLs:
1. https://cos-review.git.corp.google.com/c/cos/tools/+/149184
2. https://cos-review.git.corp.google.com/c/cos/cos-extensions/+/149046
3. https://cos-review.git.corp.google.com/c/cos/tools/+/154503

BUG=b/542405340
TEST=presubmit
RELEASE_NOTE=NONE

cos-patch:bug
Change-Id: Ic73be4f2c712d4a5ea3f6c969411c7f838c3d096
Reviewed-on: https://cos-review.googlesource.com/c/cos/cos-extensions/+/179450
Tested-by: Miri Amarilio <mirilio@google.com>
Reviewed-by: Derek Taylor <ddtaylor@google.com>