Ollama's embedding endpoint accepts both `input` and `prompt` as the
input string value (see ollama/ollama docs/api.md#generate-embeddings).
LocalAI only accepted `input`, which broke client libraries that send
the `prompt` form.
Add `Prompt` to OllamaEmbedRequest and have GetInputStrings fall back
to it when Input is unset. Input still wins when both are provided.
Fixes#9767.
Assisted-by: Claude:claude-opus-4-7 [Claude Code]
Signed-off-by: Ettore Di Giacinto <mudler@localai.io>
Co-authored-by: Ettore Di Giacinto <mudler@localai.io>