Remove the need to restart to install new plugins (Git sidecar)

[mhkarimi1383]

Hi

By adding a git sidecar container (with a emptydir shared volume for kong prefix and lua libs path) when the repo updates then it makes packages (all of the rockspec files) inside the repo and then triggers a kong reload (to reload kong and nginx) to apply updates without restart of kong pods

I want to contribute and add this thing if it's okay ;)