GeometricField: Renamed internalField() -> primitiveField() and dimensionedInternalField() -> internalField()

These new names are more consistent and logical because:

primitiveField():
primitiveFieldRef():
    Provides low-level access to the Field<Type> (primitive field)
    without dimension or mesh-consistency checking.  This should only be
    used in the low-level functions where dimensional consistency is
    ensured by careful programming and computational efficiency is
    paramount.

internalField():
internalFieldRef():
    Provides access to the DimensionedField<Type, GeoMesh> of values on
    the internal mesh-type for which the GeometricField is defined and
    supports dimension and checking and mesh-consistency checking.

src/meshTools/AMIInterpolation/patches/cyclicACMI/cyclicACMIPointPatchField/cyclicACMIPointPatchField.C

@@ -131,7 +131,7 @@ void Foam::cyclicACMIPointPatchField<Type>::swapAddSeparated
         const GeometricField<Type, pointPatchField, pointMesh>& fld =
             refCast<const GeometricField<Type, pointPatchField, pointMesh>>
             (
-                this->dimensionedInternalField()
+                this->internalField()
             );
 
         const cyclicACMIPointPatchField<Type>& nbr =

src/meshTools/AMIInterpolation/patches/cyclicAMI/cyclicAMIPointPatchField/cyclicAMIPointPatchField.C

@@ -131,7 +131,7 @@ void Foam::cyclicAMIPointPatchField<Type>::swapAddSeparated
         const GeometricField<Type, pointPatchField, pointMesh>& fld =
             refCast<const GeometricField<Type, pointPatchField, pointMesh>>
             (
-                this->dimensionedInternalField()
+                this->internalField()
             );
 
         const cyclicAMIPointPatchField<Type>& nbr =