Introduces changes to make pod sandbox updates persistent across
restarts.
This is achieved by:
- Storing the updated Overhead and Resources as an extension on the core
sandbox object and in the in-memory sandbox status store.
- Modifying the sandbox recovery logic to read this extension on startup
(this is not working in recovery unit tests yet and needs fixing).
- Updating the PodSandboxStatus CRI handler to include updated resources
from the sandbox status store.
Signed-off-by: Chris Henzie <chrishenzie@google.com>
de5b622bd9