[CICD] Merge multiple chip pipelines into one (#1209)
PR Category
CICD
PR Types
Improvements
PR Description

Merge chip-specific CI pipelines into a unified all_tests workflow,
using platform inputs to dispatch CUDA/Ascend/MetaX test suites.

Remove standalone all_tests_cuda.yml, all_tests_ascend.yml, and
all_tests_metax.yml, and reuse all_tests_common.yml for
platform-specific jobs.

Replace source artifact upload/download flow with direct
actions/checkout in reusable workflows, including retry support for
checkout failures.

Centralize training and unit-test environment setup in
setup_training_test_env.sh, covering CUDA, Ascend, and MetaX
dependency preparation.

Improve unit-test runner behavior with platform-aware accelerator
detection, default distributed backend, torch device type, configurable
coverage output, and support for pytest path ignores plus nodeid
deselection.

Update MetaX CI configuration from C500 to C550, including display
names, runner labels, and dataset/tokenizer mount paths.

Add MetaX Qwen3 0.6B benchmark configuration and gold values.
(disabled for now because of the unstable performance)

Refine Ascend and MetaX platform test configs by excluding unit tests
that are currently incompatible or unstable in the corresponding CI
runtime.