mistral: Add DevstralSmallLatest model to Mistral and Ollama (#31099)

Mistral just released a sota coding model:
https://mistral.ai/news/devstral

This PR adds support for it in both ollama and mistral

Release Notes:

- Add DevstralSmallLatest model to Mistral and Ollama

crates/ollama/src/ollama.rs

@@ -54,9 +54,8 @@ fn get_max_tokens(name: &str) -> usize {
         "mistral" | "codestral" | "mixstral" | "llava" | "qwen2" | "qwen2.5-coder"
         | "dolphin-mixtral" => 32768,
         "llama3.1" | "llama3.2" | "llama3.3" | "phi3" | "phi3.5" | "phi4" | "command-r"
-        | "qwen3" | "gemma3" | "deepseek-coder-v2" | "deepseek-v3" | "deepseek-r1" | "yi-coder" => {
-            128000
-        }
+        | "qwen3" | "gemma3" | "deepseek-coder-v2" | "deepseek-v3" | "deepseek-r1" | "yi-coder"
+        | "devstral" => 128000,
         _ => DEFAULT_TOKENS,
     }
     .clamp(1, MAXIMUM_TOKENS)