[Fix] Torch random.shuffle(axis=-1) mishandles negative axes

[ChiragSW]

Description

Fixes: #23118
axis now goes through canonicalize_axis(). Added a small test for axis=-1.

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[gemini-code-assist]

Code Review

This pull request updates the PyTorch backend's random.shuffle implementation to support negative axes by using canonicalize_axis. It also adds a test case in keras/src/random/random_test.py to verify that shuffling works correctly with axis=-1. There are no review comments, and I have no feedback to provide.

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[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 75.24%. Comparing base (e0bfa2d) to head (67f8e00).

❗ There is a different number of reports uploaded between BASE (e0bfa2d) and HEAD (67f8e00). Click for more details.

HEAD has 18 uploads less than BASE

Flag	BASE (e0bfa2d)	HEAD (67f8e00)
keras	9	3
keras-tpu	2	0
keras-jax	3	0
keras-cpu	5	3
keras-numpy	1	0
keras-torch	2	1
keras-tensorflow	2	1
keras-gpu	2	0

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #23119      +/-   ##
==========================================
- Coverage   84.69%   75.24%   -9.46%     
==========================================
  Files         464      464              
  Lines       68957    68959       +2     
  Branches    11331    11331              
==========================================
- Hits        58404    51888    -6516     
- Misses       7624    14364    +6740     
+ Partials     2929     2707     -222     

Flag	Coverage Δ
keras	75.11% <100.00%> (-9.39%)	⬇️
keras-cpu	75.11% <100.00%> (-8.76%)	⬇️
keras-gpu	?
keras-jax	?
keras-numpy	?
keras-openvino	59.51% <50.00%> (+<0.01%)	⬆️
keras-tensorflow	59.52% <50.00%> (-0.29%)	⬇️
keras-torch	58.65% <100.00%> (-0.40%)	⬇️
keras-tpu	?

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[ChiragSW]

I don't know why the one numpy test is failing. It's passing on my machine with numpy backend.
Logs:

PS C:\Users\watta\hive\keras> $env:KERAS_BACKEND='numpy'   
PS C:\Users\watta\hive\keras> pytest keras/src/ops/image_test.py::ImageOpsDtypeTest::test_perspective_transform_bfloat16
===================================================== test session starts =====================================================
platform win32 -- Python 3.10.9, pytest-9.0.2, pluggy-1.6.0 -- C:\Users\watta\AppData\Local\Programs\Python\Python310\python.exe
cachedir: .pytest_cache
rootdir: C:\Users\watta\hive\keras
configfile: pyproject.toml
plugins: anyio-4.11.0, langsmith-0.4.38
collected 1 item                                                                                                               

keras/src/ops/image_test.py::ImageOpsDtypeTest::test_perspective_transform_bfloat16 PASSED                               [100%]

====================================================== 1 passed in 2.28s ======================================================

@hertschuh please help me out here