Investigate runtime change to update the program cache after deploy/upgrade/close

[buffalojoec]

Since BPF programs can't directly access the program cache's API, there's no way a loader program could update the cache whenever a program is deployed, upgraded, or closed.

Instead, we may need to infer this information from the result of the program, and here's where we will start to define what the relationship between the runtime and a "Core" BPF program looks like.