[BUG] Cannot specify non-default interpolator for ANTsRegistrator

Start at the ANTsRegistrator entry point and trace how transformation_params reaches the registration call, using the provided reproduction with interpolator set to linear. Confirm the duplicate interpolator argument is removed and that registration completes while honoring the requested interpolator; add or run a regression test if the project has one.

Describe the bug
Specifying transformation_params={'interpolator': 'linear'} when instantiating ANTsRegistrator results in a Type Error when performing registration.

TypeError: ants.registration.apply_transforms.apply_transforms() got multiple values for keyword argument 'interpolator'

To Reproduce

from brainles_preprocessing.brain_extraction import HDBetExtractor
from brainles_preprocessing.constants import Atlas
from brainles_preprocessing.modality import Modality, CenterModality
from brainles_preprocessing.preprocessor import (
    AtlasCentricPreprocessor,
)
from brainles_preprocessing.registration import ANTsRegistrator
from brainles_preprocessing.n4_bias_correction import SitkN4BiasCorrector

center_params = {} #your center modality params here
center_modality = CenterModality(**center_params)

mod1_params = {} #your modality 1 params here
modality_1 = Modality(**mod1_params)

mod2_params = {} #your modality 2 params here
modality_2 = Modality(**mod2_params)

mod3_params = {} #your modality 3 params here
modality_3 = Modality(**mod3_params)

modalities = [modality_1, modality_2, modality_3]

preprocessor = AtlasCentricPreprocessor(
    center_modality=center_modality,
    moving_modalities=modalities,
    registrator=ANTsRegistrator(transformation_params={'interpolator': 'linear'}),
    brain_extractor=HDBetExtractor(),
    n4_bias_corrector=SitkN4BiasCorrector(),
    atlas_image_path=Atlas.BRATS_MNI152,
)
preprocessor.run()

Expected behavior
No error is raised as the ability to specify the interpolator is an expected feature.

Environment

operating system and version?

python 3.12 on debian bookworm container.

NVIDIA drivers and GPUs

+-----------------------------------------------------------------------------------------+
| NVIDIA-SMI 580.126.18             Driver Version: 580.126.18     CUDA Version: 13.0     |
+-----------------------------------------+------------------------+----------------------+
| GPU  Name                 Persistence-M | Bus-Id          Disp.A | Volatile Uncorr. ECC |
| Fan  Temp   Perf          Pwr:Usage/Cap |           Memory-Usage | GPU-Util  Compute M. |
|                                         |                        |               MIG M. |
|=========================================+========================+======================|
|   0  NVIDIA GeForce RTX 3060        Off |   00000000:08:00.0  On |                  N/A |
|  0%   45C    P8             20W /  170W |    2478MiB /  12288MiB |     49%      Default |
|                                         |                        |                  N/A |
+-----------------------------------------+------------------------+----------------------+

+-----------------------------------------------------------------------------------------+
| Processes:                                                                              |
|  GPU   GI   CI              PID   Type   Process name                        GPU Memory |
|        ID   ID                                                               Usage      |
|=========================================================================================|
|  No running processes found                                                             |
+-----------------------------------------------------------------------------------------+

Python environment and version?

python 3.12 on debian bookworm container

version of brainles_preprocessing ?

0.6.10