sync : ggml (#5452)
* ggml-alloc : v3 (ggml/727)
* ggml-alloc v3
ggml-ci
* fix ci
ggml-ci
* whisper : check for backend buffer allocation failures
* whisper : avoid leaks when initialization fails
* cleanup
ggml-ci
* style fixes
ggml-ci
* sync : ggml
* update llama.cpp, clip.cpp, export-lora.cpp
* update finetune.cpp, train-text-from-scratch.cpp
ggml-ci
* ggml-backend : reduce alignment to 32 to match gguf and fix mmap
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Co-authored-by: slaren <slarengh@gmail.com>
