Fix mock attribute names to match AnatomicalLongOutputs fields

The mocks used `long_to_anat_xfm`/`anat_to_long_xfm` but the actual
NamedTuple fields are `long_to_template_xfm`/`template_to_long_xfm`.
Mock() silently creates any attribute, so this mismatch was invisible.

Author: nx10

tests/unit/orchestration/test_longitudinal.py

@@ -56,8 +56,8 @@ def _mock_anat_outputs() -> Mock:
     m.csf_mask = fake / "csf_mask.nii.gz"
     m.gm_mask = fake / "gm_mask.nii.gz"
     m.wm_mask = fake / "wm_mask.nii.gz"
-    m.long_to_anat_xfm = fake / "long_to_anat_xfm.nii.gz"
-    m.anat_to_long_xfm = fake / "anat_to_long_xfm.nii.gz"
+    m.long_to_template_xfm = fake / "long_to_template_xfm.nii.gz"
+    m.template_to_long_xfm = fake / "template_to_long_xfm.nii.gz"
     return m