Make native embedder the fallback for all LLMs (#1427)

server/utils/AiProviders/anthropic/index.js

server/utils/AiProviders/azureOpenAi/index.js

server/utils/AiProviders/cohere/index.js

server/utils/AiProviders/gemini/index.js

server/utils/AiProviders/genericOpenAi/index.js

server/utils/AiProviders/groq/index.js

server/utils/AiProviders/huggingface/index.js

server/utils/AiProviders/koboldCPP/index.js

server/utils/AiProviders/liteLLM/index.js

server/utils/AiProviders/lmStudio/index.js

server/utils/AiProviders/localAi/index.js

server/utils/AiProviders/mistral/index.js

server/utils/AiProviders/native/index.js

server/utils/AiProviders/ollama/index.js

server/utils/AiProviders/openAi/index.js

server/utils/AiProviders/openRouter/index.js

server/utils/AiProviders/perplexity/index.js

server/utils/AiProviders/textGenWebUI/index.js

server/utils/AiProviders/togetherAi/index.js