Accept wrapped text content from LLM providers (#31048)

Some providers sometimes send `{ "type": "text", "text": ... }` instead
of just the text as a string. Now we accept those instead of erroring.

Release Notes:

- N/A

crates/language_models/src/provider/google.rs

@@ -426,14 +426,17 @@ pub fn into_google(
                 }
                 language_model::MessageContent::ToolResult(tool_result) => {
                     match tool_result.content {
-                        language_model::LanguageModelToolResultContent::Text(txt) => {
+                        language_model::LanguageModelToolResultContent::Text(text)
+                        | language_model::LanguageModelToolResultContent::WrappedText(
+                            language_model::WrappedTextContent { text, .. },
+                        ) => {
                             vec![Part::FunctionResponsePart(
                                 google_ai::FunctionResponsePart {
                                     function_response: google_ai::FunctionResponse {
                                         name: tool_result.tool_name.to_string(),
                                         // The API expects a valid JSON object
                                         response: serde_json::json!({
-                                            "output": txt
+                                            "output": text
                                         }),
                                     },
                                 },