metal : rope_back 연산자 구현 (#24725)

기존의 rope 커널을 함수 상수(function constant)와 함께 재사용하여 순방향/역방향 회전 (forward/backward rotation)을 전환함으로써, 커널 코드의 중복을 방지합니다.

도움 주심: pi:llama.cpp/Qwen3.6-27B

macOS/iOS:

• macOS Apple Silicon (arm64)
• macOS Apple Silicon (arm64, KleidiAI 활성화) 비활성화됨
• macOS Intel (x64)
• iOS XCFramework

Linux:

• Ubuntu x64 (CPU)
• Ubuntu arm64 (CPU)
• Ubuntu s390x (CPU)
• Ubuntu x64 (Vulkan)
• Ubuntu arm64 (Vulkan)
• Ubuntu x64 (ROCm 7.2)
• Ubuntu x64 (OpenVINO)
• Ubuntu x64 (SYCL FP32)
• Ubuntu x64 (SYCL FP16)

Android:

<strong>Android:</strong>

• Android arm64 (CPU)

<strong>Windows:</strong>

• Windows x64 (CPU)
• Windows arm64 (CPU)
• Windows x64 (CUDA 12) - CUDA 12.4 DLLs
• Windows x64 (CUDA 13) - CUDA 13.3 DLLs
• Windows x64 (Vulkan)
• Windows x64 (OpenVINO)
• Windows x64 (SYCL)
• Windows x64 (HIP)

<strong>openEuler:</strong>

• DISABLED
• openEuler x86 (310p)
• openEuler x86 (910b, ACL Graph)
• openEuler aarch64 (310p)
• openEuler aarch64 (910b, ACL Graph)

<strong>UI:</strong>

• UI