cos-extensions: skip postInstall when nvidia-gridd and persistenced unit exist

BUG=b/573970841
TEST=unit tests; use custom gpu-installer and cos-extensions to install gpu driver on a fractional VM, verify license and CUDA.
RELEASE_NOTE=None

#### IMPORTANT NOTE ####
Only merge this after merging go/cos-rev/227866, making a new cos-gpu-installer release and consuming that version on cos-extensions ebuild.

cos-patch: bug
Change-Id: I62b56ac4c23eb8f83821dd68fa1bb2ee45b0fc25
Reviewed-on: https://cos-review.googlesource.com/c/cos/cos-extensions/+/228667
Reviewed-by: Robert Kolchmeyer <rkolchmeyer@google.com>
Tested-by: Cusky Presubmit Bot <presubmit@cos-infra-prod.iam.gserviceaccount.com>
2 files changed
tree: 0bb5f86f19b49ef3e1fa87f7648e5a832644443e
  1. commands/
  2. extensions/
  3. tools/
  4. vendor/
  5. CONTRIBUTING.md
  6. cos-extensions.go
  7. go.mod
  8. go.sum
  9. README.md
README.md

cos-extensions for Container-Optimized OS

cos-extensions is a tool used in Container-Optimized OS. It provides utility to manage COS extensions.

See CONTRIBUTING.md for how to contribute.