adding paganin_filter_savu_legacy memory reference

Author: dkazanc

httomo_backends/methods_database/packages/backends/httomolibgpu/httomolibgpu.yaml

@@ -97,6 +97,15 @@ prep:
       memory_gpu:
         multiplier: None
         method: module
+    paganin_filter_savu_legacy:
+      pattern: projection
+      output_dims_change: False
+      implementation: gpu_cupy
+      save_result_default: False
+      padding: False
+      memory_gpu:
+        multiplier: None
+        method: module       
   alignment:
     distortion_correction_proj_discorpy:
       pattern: projection

httomo_backends/methods_database/packages/backends/httomolibgpu/supporting_funcs/prep/phase.py

@@ -27,9 +27,18 @@
 
 __all__ = [
     "_calc_memory_bytes_paganin_filter",
+    "_calc_memory_bytes_paganin_filter_savu_legacy",
 ]
 
 
+def _calc_memory_bytes_paganin_filter_savu_legacy(
+    non_slice_dims_shape: Tuple[int, int],
+    dtype: np.dtype,
+    **kwargs,
+) -> Tuple[int, int]:
+    return _calc_memory_bytes_paganin_filter(non_slice_dims_shape, dtype, **kwargs)
+
+
 def _calc_memory_bytes_paganin_filter(
     non_slice_dims_shape: Tuple[int, int],
     dtype: np.dtype,