Move CachedActionInterceptor to core / api

WDYT ?
As this action only use the Cache service, it should be available without the ehcache-cache implementation.

Second idea : moving ehcache-cache implem from framework and settle it in extensions. It would be easier to use a custom made Cache implementation and framework / core seems to not rely on it.

[cescoffier]

Instead of moving it to API, what about moving is to wisdom-filters ?