fix!: minimize argsort overloads

[voltjia]

Summary

• Remove the three trailing-default convenience overloads added by feat: align argsort with PyTorch parameter order #809.
• Keep exactly one PyTorch-ordered primary interface and one [[deprecated]] pre-feat: align argsort with PyTorch parameter order #809 compatibility interface.

Motivation

#809 corrected the public parameter order but represented each Python default with another C++ overload. That unnecessarily expanded the API surface. C++ callers can pass the Python defaults explicitly while retaining the correct names and order.

This is a follow-up to #809; no standalone issue is associated with it.

Type of Change

• feat - new feature / new operator / new platform
• fix - bug fix
• perf - performance improvement (no behavioral change)
• refactor - code restructuring without behavior change
• test - adding or fixing tests only
• docs - documentation only
• build / ci - build system or CI configuration
• chore - tooling, formatting, or other non-code changes
• Breaking change

Platforms Affected

• CPU (WITH_CPU)
• NVIDIA (WITH_NVIDIA)
• Iluvatar (WITH_ILUVATAR)
• MetaX (WITH_METAX)
• Cambricon (WITH_CAMBRICON)
• Moore (WITH_MOORE)
• Ascend (WITH_ASCEND)
• PyTorch C++ bindings (WITH_TORCH)
• Build system / CMake / CI
• Python bindings / user-facing API

Smoke Test Result

Host: ssh nvidia
Image: accelerator-dev/nvidia:latest
PyTorch: 2.10.0a0+b4e4ee8

cmake ... -DWITH_CPU=ON -DWITH_NVIDIA=ON -DWITH_TORCH=ON \
  -DINFINI_OPS_OPS=argsort -DINFINI_OPS_TORCH_OPS=argsort
cmake --build build-nvidia --target ops -j 16
Build passed; codegen emitted 1 ATen implementation overload.

python -m pytest tests/test_generate_wrappers.py -q
13 passed

python -m pytest tests/test_argsort.py --devices cpu nvidia -q
10 passed

Test Results on Supported Platforms

Platform	Affected	Build / Smoke Result	Full Result / Notes
CPU	Yes	targeted build passed	Primary and deprecated paths passed
NVIDIA	Yes	targeted build passed	Primary and deprecated paths passed
Iluvatar	No	N/A - not affected	N/A - not affected
MetaX	No	N/A - not affected	N/A - not affected
Cambricon	No	N/A - not affected	N/A - not affected
Moore	No	N/A - not affected	N/A - not affected
Ascend	No	N/A - not affected	N/A - not affected

Benchmark / Performance Impact

N/A. This only removes convenience routing; the ATen implementation is unchanged.

Notes for Reviewers

API alignment

Interface	Signature	Alignment basis
InfiniOps primary	argsort(input, dim, descending, stable, out)	PyTorch parameters in Python order; explicit out remains last per CONTRIBUTING.md.
PyTorch public API	torch.argsort(input, dim=-1, descending=False, stable=False, *, out=None)	Pinned PyTorch source
Deprecated compatibility	argsort(input, stable, dim, descending, out)	Preserves the pre-#809 interface for migration.

• C++ callers pass -1, false, and false explicitly when they want PyTorch defaults.
• Ruff 0.15.22 and clang-format 21.1.8 checks passed.