feat: add platform-adaptive runtime tests

[voltjia]

Summary

• Replace CPU/NVIDIA-specific runtime tests with one parameterized backend runtime test in tests/test_native_runtime.cc.
• Update tests/CMakeLists.txt so enabled runtime backends instantiate the same native runtime test and define dispatch-test backend coverage macros.
• Extend tests/test_runtime_dispatch.cc and tests/install_consumer_smoke.cc so runtime tests adapt to CPU, NVIDIA, Iluvatar, MetaX, Cambricon, Moore, and Ascend builds.
• Add backend device-availability probing so tests skip cleanly when a configured backend has no usable device in the current container.
• Fix Cambricon compatibility in src/native/cambricon/runtime_.h for CNRT versions that use cnrtSuccess and the queue-before-kind cnrtMemcpyAsync signature.

Motivation

InfiniRT needs to support multiple accelerator platforms, but the existing runtime tests were mostly duplicated around CPU and NVIDIA. That made new backend coverage harder to maintain and easy to miss. This PR adds a reusable test mechanism so future runtime API work can be validated consistently across all enabled platforms.

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 (requires a ! in the Conventional Commits prefix or a BREAKING CHANGE: footer)

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

git diff --check

ssh nvidia: accelerator-dev/nvidia:latest
cmake -B build -DWITH_CPU=ON -DWITH_NVIDIA=ON -DINFINI_RT_BUILD_TESTING=ON -DCMAKE_BUILD_TYPE=Release
cmake --build build -j$(nproc)
cd build && ctest --output-on-failure
100% tests passed, 0 tests failed out of 7

ssh cambricon: accelerator-dev/cambricon:latest
cmake -B build -DWITH_CPU=ON -DWITH_CAMBRICON=ON -DINFINI_RT_BUILD_TESTING=ON -DCMAKE_BUILD_TYPE=Release
cmake --build build -j$(nproc)
cd build && ctest
100% tests passed, 0 tests failed out of 7

Test Results on Supported Platforms

Platform	Affected	Build / Smoke Result	Full Result / Notes
NVIDIA	Yes	full passed	accelerator-dev/nvidia:latest, 7/7 CTest passed
Iluvatar	Yes	full passed	accelerator-dev/iluvatar:latest, 7/7 CTest passed
MetaX	Yes	full passed	accelerator-dev/metax:latest, 7/7 CTest passed; CMake was installed temporarily via pip because the image did not include it
Cambricon	Yes	full passed	accelerator-dev/cambricon:latest, 7/7 CTest passed
Moore	Yes	full passed	accelerator-dev/moore:latest, 7/7 CTest passed
Ascend	Yes	full passed	accelerator-dev/ascend:latest, CTest output reported 7/7 passed; SSH returned non-zero due to the known host-side issue unrelated to project tests

Full `pytest` output (optional)

N/A - this repository uses CTest for the runtime checks in this PR.

Benchmark / Performance Impact

N/A - this PR changes test coverage and a small Cambricon SDK compatibility path; it is not performance-sensitive.

Notes for Reviewers

• Ascend install-consumer coverage validates public headers and linkage only. Runtime behavior is covered by test_ascend_runtime and test_runtime_dispatch; install-consumer runtime execution can hang in stub/no-device environments.
• Backend runtime tests now probe device availability first and skip runtime behavior when no usable device is exposed by the container.