Add version caching for hot loaded plugins

[lyuboxa]

Building plugins each time the pod restarts or reloads for the same version seems unnecessary, improve with per-conduit resource test.

[hariso]

Maybe first try fetching a released binary, and then, if there isn't one, try to build (using a cache)?

[lyuboxa]

Maybe first try fetching a released binary, and then, if there isn't one, try to build (using a cache)?

Yea, we can do this and then fallback to building if a release doesn't exist? This is probably a separate tool altogether.