Containerd config customization

[mikhail-sakhnov]

Is your feature request related to a problem? Please describe.

As a user I want to have way to customize containerd configuration easily

Describe the solution you would like

containerd supports import&merge for toml files, by using directive imports

One of the options is to point it to some fs location to watch for a customized configs.

Describe alternatives you've considered

No response

Additional context

It might be a first step to implement plugin based systems as described in the related proposal.