Hide inspect warning noise

[DingmaomaoBJTU]

Summary

• Hide Hugging Face, Transformers, and native ONNX Runtime warning noise during normal winml inspect runs.
• Preserve diagnostics through -v, -vv, and WINMLCLI_SHOW_ALL_WARNINGS=1.
• Scope Hugging Face warning suppression to inspect and restore logger/env/library verbosity state afterward.
• Add regression coverage for suppression, opt-outs, native stderr behavior, and state restoration.

Validation

• python -m ruff check src\winml\modelkit\commands\inspect.py src\winml\modelkit\utils\logging.py src\winml\modelkit\utils\native_stderr.py tests\cli\test_import_time.py tests\unit\commands\test_inspect_cli.py tests\unit\utils\test_logging.py tests\unit\utils\test_native_stderr.py
• python -m pytest tests\unit\utils\test_logging.py tests\unit\commands\test_inspect_cli.py tests\unit\utils\test_native_stderr.py tests\cli\test_import_time.py::TestCommandHelp::test_inspect_model_type_hides_onnxruntime_startup_warning -q
• python -m winml.modelkit inspect -m facebook/convnext-tiny-224 default / -v / WINMLCLI_SHOW_ALL_WARNINGS=1 smoke checks