chore: ⬆️ Update leejet/stable-diffusion.cpp to 4ff2c8c74bd17c2cfffe3a01be77743fb3efba2f (#7771)

* :arrow_up: Update leejet/stable-diffusion.cpp

Signed-off-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

* fix: Add KL_OPTIMAL scheduler, pass sampler to default scheduler for LCM and fixup other refactorings from upstream

Signed-off-by: Richard Palethorpe <io@richiejp.com>

* Delete backend/go/stablediffusion-ggml/compile_commands.json

Signed-off-by: Ettore Di Giacinto <mudler@users.noreply.github.com>

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Signed-off-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Signed-off-by: Richard Palethorpe <io@richiejp.com>
Signed-off-by: Ettore Di Giacinto <mudler@users.noreply.github.com>
Co-authored-by: mudler <2420543+mudler@users.noreply.github.com>
Co-authored-by: Ettore Di Giacinto <mudler@users.noreply.github.com>