Don't trigger daemons in cos-extensions - logic moved to cos-gpu-installer

** NOTE **
Once this topic is merged, update extensions-manager with the commit hash and installer version.

BUG=b/502284908
TEST=Run custom cos-extensions and custom cos-gpu-installer on VMs, installing grid and non-grid GPU drivers. On grid: test license and CUDA workload.
RELEASE_NOTE=None

Change-Id: I1244384f2d9bfe47dc4a2d364c212fc37f3339f6
Reviewed-on: https://cos-review.googlesource.com/c/cos/cos-extensions/+/149046
Reviewed-by: Robert Kolchmeyer <rkolchmeyer@google.com>
Tested-by: Miri Amarilio <mirilio@google.com>