feat(ascend): add rotary_embedding operator

[zhangyue207]

Summary

• Add the Ascend rotary_embedding implementation adapted to the existing upstream master base API.
• Keep the upstream base signature and do not include the origin-only optional key, inplace, pre_gathered, 2D, ATB, or partial-rotary API extensions.
• Add focused tests/test_rotary_embedding.py coverage for the supported 3D full-rotary path.

Validation

• git diff --check upstream/master...HEAD
• clang-format --dry-run --Werror src/native/ascend/ops/rotary_embedding/kernel.h
• ruff format --check tests/test_rotary_embedding.py
• ruff check tests/test_rotary_embedding.py