Defer to camera geometry instead of raw formatter for intiial WCS.

This is a small cleanup (reducing reliance on a middleware interface
we'd prefer to stop treating as public) that should only be merged
after the 'camera' datasets in all LATISS repos have been rebuilt with
post-DM-20746 code.

Author: TallJimbo

python/activator/middleware_interface.py

@@ -48,6 +48,7 @@
 import lsst.dax.apdb
 import lsst.geom
 import lsst.obs.base
+from lsst.obs.base.utils import createInitialSkyWcsFromBoresight
 import lsst.pipe.base
 from lsst.pipe.base.quantum_graph_builder import QuantumGraphBuilderError
 import lsst.analysis.tools
@@ -446,8 +447,7 @@ def _predict_wcs(self, detector: lsst.afw.cameraGeom.Detector) -> lsst.afw.geom.
         except RuntimeError as e:
             raise _NoPositionError(str(e)) from e
 
-        formatter = self.instrument.getRawFormatter({"detector": detector.getId()})
-        return formatter.makeRawSkyWcsFromBoresight(boresight_center, orientation, detector)
+        return createInitialSkyWcsFromBoresight(boresight_center, orientation, detector)
 
     def _compute_region(self) -> lsst.sphgeom.Region:
         """Compute the sky region of this visit for preload