Possibility to enable a disable the different purge types

Problem/Motivation

There may be cases where, for a given system, you only need to purge URLs — for example, to manage the caching of files — and you do not need to perform purges using cache tags. This could be the case if you are only using the CDN to cache static assets.

It would be very useful to be able to enable or disable different types of purges depending on the context.

Proposed resolution

One possible solution could be, for example, to split each of the purger types into separate plugins.