Enable _linalg_det, _linalg_slogdet and _linalg_solve_ex related operations on xpu

[huiyan2021]

This pull request stacks on #1563. It introduces support for _linalg_det, _linalg_slogdet and _linalg_solve_ex related operations on XPU devices:

• _linalg_det & _linalg_det.result
• _linalg_slogdet & _linalg_slogdet.sign
• '_linalg_solve_ex' & _linalg_solve_ex.result

It also removes fallback implementations for these operations in favor of optimized XPU-specific implementations. Corresponding tests have been updated to reflect the new support.

New XPU Kernel Implementations:

Since _linalg_det, _linalg_slogdet and _linalg_solve_ex call linalg_lu_factor_ex.out underneath, which has been implemented in #1563, no new kernels need to be added in this pull request. Only dispatching these operations in third_party/torch-xpu-ops/yaml/native/native_functions.yaml would work.

Removal of Fallbacks:

Removed fallback entries for _linalg_det, _linalg_slogdet and _linalg_solve_ex related operations from third_party/torch-xpu-ops/src/ATen/native/xpu/XPUFallback.template. These operations now have dedicated XPU implementations.

Test Adjustments:

Updated the skip list in test/xpu/skip_list_common.py to remove passed and removed linalg_det, linalg_slogdet and _linalg_solve_ex related UTs.

Fix #1597

[Copilot]

Pull Request Overview

This pull request introduces optimized XPU-specific support for determinant and sign/log-determinant operations by dispatching to dedicated XPU kernels and removing fallbacks. It also updates the test suite and skip lists accordingly to reflect the new support.

• Added YAML entries for _linalg_det and _linalg_slogdet with structured delegates and XPU-specific dispatch.
• Updated test files to include new LU-family and LU-solve tests while removing obsolete fallback tests.
• Removed fallback implementations and adjusted skip lists in test files.

Reviewed Changes

Copilot reviewed 6 out of 7 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
yaml/native/native_functions.yaml	Added structured function entries for _linalg_det and _linalg_slogdet with XPU dispatch support.
test/xpu/test_linalg_xpu.py	Introduced new tests for LU-family and LU-solve operations; refactored imports and test registration.
test/xpu/skip_list_common.py	Removed skip tests related to linalg_det and linalg_slogdet operations.
src/ATen/native/xpu/mkl/BatchLinearAlgebra.h	Defined new MKL-based linear algebra function prototypes for XPU.
src/ATen/native/xpu/BatchLinearAlgebra.cpp	Added XPU kernel implementations for SVD, LU solve, and LU factor with CPU fallback support.

Files not reviewed (1)

• src/ATen/native/xpu/XPUFallback.template: Language not supported