Implement polling for policy bundle changes #3458
Description
As a GitOps user
I want NGF to poll for updates to my policy bundle file
So that updates will be automatically applied to my resources
Acceptance
- NGF polls the policy location and compares the remote state (eTag or checksum) with the local state for the referenced policy
- If the remote policy has changed, pull the policy and distribute it to the required dataplane(s)
- The poll interval, change detection method (eTag/checksum), and checksum location are configurable