dirstate-item: feed more information to `__init__` Instead of processing the "rich" value at the `dirstatemap` level, we can now directly pass them to the DirstateItem object. This will make the object free to store whatever its want and to implements it logic whatever its want. For now… we simply process the flag and store the same good old value. However this pave the way for doing things differently once the rest of dirstatemap code is updated. Nobody call this code yet. Differential Revision: https://phab.mercurial-scm.org/D11320

rust-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`. The Rust dirstate map will need an overall once the durst settle anyway. Differential Revision: https://phab.mercurial-scm.org/D11319

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