dirstatemap: temporarily use `from_v1_data` in `addfile` We are about to change the `__init__` for `DirstateItem`. To make the transition easier, we move existing caller to `DirstateItem.from_v1_data`. Differential Revision: https://phab.mercurial-scm.org/D11318

dirstate-item: fix the declaration of the Cext `from_v1_meth` This method is apparently not called from anywhere since the declaration was garbage. We will start calling it in the next changeset. Differential Revision: https://phab.mercurial-scm.org/D11317

dirstate-item: fix Cext declaration of dm_nonnormal and dm_otherparent These are property, not method. Differential Revision: https://phab.mercurial-scm.org/D11316

dirstatemap: replace `removefile` by an explicit `entry.set_untracked()` All the other caller goes through `reset_state`, so we can safely have an explicit method on `DirstateItem` object. This means that all the logic to preserve the previous state (from p2, merged, etc) is now properly encapsulated within the DirstateItem. This pave the way to using different storage for these information. Differential Revision: https://phab.mercurial-scm.org/D11315

dirstate: forward `remove` call to newer `API` The `_remove` method was only called in the deprecated `remove` function. We merge the two and express it in terms of call to new API methods. Differential Revision: https://phab.mercurial-scm.org/D11314

Added signature for changeset 86a60679cf61