b11619

models: drop the t_embd expand of the embedding graphs (#30461)

These graphs only produce embeddings, and build_pooling() already
expands its output for every pooling type, so the expand at the end of
the model graph is redundant.

Website:

• https://llama.app

Attestations:

• https://github.com/ggml-org/llama.cpp/attestations/55957395

macOS/iOS:

• macOS Apple Silicon (arm64)
• macOS Apple Silicon (arm64, KleidiAI enabled) DISABLED
• macOS Intel (x64)
• iOS XCFramework

Linux:

• Ubuntu x64 (CPU)
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• Ubuntu s390x (CPU)
• Ubuntu x64 (Vulkan)
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• Android arm64 (CPU)
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• Windows x64 (CPU)
• Windows arm64 (CPU)
• Windows arm64 (OpenCL Adreno)
• Windows x64 (CUDA 12) - CUDA 12.4 DLLs
• Windows x64 (CUDA 13) - CUDA 13.4 DLLs
• Windows arm64 (CUDA 13) - CUDA 13.4 DLLs
• Windows x64 (Vulkan)
• Windows arm64 (Vulkan)
• Windows x64 (OpenVINO)
• Windows x64 (SYCL)
• Windows x64 (ROCm 10.0)

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• UI