fix: add missing method param to MvNormalSVD initialisation

[aphc14]

Hey guys,

I would like to use pytensor2.28.0 and Python3.13 and stumbled across a few installation issues. The description below gives some extra context on a minor PR I will send shortly.

---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
Cell In[1], line 11
      9 import numpy as np
     10 import pandas as pd
---> 11 import pymc_extras
     12 import arviz as az
     14 import pytensor

File ~/projects/pymc-devs/pymc-extras/pymc_extras/__init__.py:16
      1 #   Copyright 2022 The PyMC Developers
      2 #
      3 #   Licensed under the Apache License, Version 2.0 (the "License");
   (...)
     12 #   See the License for the specific language governing permissions and
     13 #   limitations under the License.
     14 import logging
---> 16 from pymc_extras import gp, statespace, utils
     17 from pymc_extras.distributions import *
     18 from pymc_extras.inference.find_map import find_MAP

File ~/projects/pymc-devs/pymc-extras/pymc_extras/statespace/__init__.py:1
----> 1 from pymc_extras.statespace.core.compile import compile_statespace
      2 from pymc_extras.statespace.models import structural
      3 from pymc_extras.statespace.models.ETS import BayesianETS

File ~/projects/pymc-devs/pymc-extras/pymc_extras/statespace/core/__init__.py:4
      1 # ruff: noqa: I001
      3 from pymc_extras.statespace.core.representation import PytensorRepresentation
----> 4 from pymc_extras.statespace.core.statespace import PyMCStateSpace
      5 from pymc_extras.statespace.core.compile import compile_statespace
      7 __all__ = ["PytensorRepresentation", "PyMCStateSpace", "compile_statespace"]

File ~/projects/pymc-devs/pymc-extras/pymc_extras/statespace/core/statespace.py:23
     20 from rich.table import Table
     22 from pymc_extras.statespace.core.representation import PytensorRepresentation
---> 23 from pymc_extras.statespace.filters import (
     24     KalmanSmoother,
     25     SquareRootFilter,
     26     StandardFilter,
     27     UnivariateFilter,
     28 )
     29 from pymc_extras.statespace.filters.distributions import (
     30     LinearGaussianStateSpace,
     31     MvNormalSVD,
     32     SequenceMvNormal,
     33 )
     34 from pymc_extras.statespace.filters.utilities import stabilize

File ~/projects/pymc-devs/pymc-extras/pymc_extras/statespace/filters/__init__.py:1
----> 1 from pymc_extras.statespace.filters.distributions import LinearGaussianStateSpace
      2 from pymc_extras.statespace.filters.kalman_filter import (
      3     SquareRootFilter,
      4     StandardFilter,
      5     UnivariateFilter,
      6 )
      7 from pymc_extras.statespace.filters.kalman_smoother import KalmanSmoother

File ~/projects/pymc-devs/pymc-extras/pymc_extras/statespace/filters/distributions.py:59
     55     dtype = "floatX"
     56     _print_name = ("MultivariateNormal", "\\operatorname{MultivariateNormal}")
---> 59 class MvNormalSVD(MvNormal):
     60     """Dummy distribution intended to be rewritten into a JAX multivariate_normal with method="svd".
     61 
     62     A JAX MvNormal robust to low-rank covariance matrices
     63     """
     65     rv_op = MvNormalSVDRV()

File ~/projects/pymc-devs/pymc-extras/pymc_extras/statespace/filters/distributions.py:65, in MvNormalSVD()
     59 class MvNormalSVD(MvNormal):
     60     """Dummy distribution intended to be rewritten into a JAX multivariate_normal with method="svd".
     61 
     62     A JAX MvNormal robust to low-rank covariance matrices
     63     """
---> 65     rv_op = MvNormalSVDRV()

TypeError: MvNormalRV.__init__() missing 1 required keyword-only argument: 'method'

[aphc14]

Closing issue. See #429