updatecaches: introduce a set of constants to control which are updated Passing around a set of constant to select what need warming will be cleaner and more flexible. We did not changed the API yet, as this changes is already large enough. In the rest of the rest we will change more code to actually use this constants (or more realistically pre-defined set of constant directly) Differential Revision: https://phab.mercurial-scm.org/D10727