Replace zed_llm_client with cloud_llm_client (#35309)

This PR replaces the usage of the `zed_llm_client` with the
`cloud_llm_client`.

It was ported into this repo in #35307.

Release Notes:

- N/A

crates/language_models/src/provider/copilot_chat.rs

@@ -3,6 +3,7 @@ use std::str::FromStr as _;
 use std::sync::Arc;
 
 use anyhow::{Result, anyhow};
+use cloud_llm_client::CompletionIntent;
 use collections::HashMap;
 use copilot::copilot_chat::{
     ChatMessage, ChatMessageContent, ChatMessagePart, CopilotChat, ImageUrl,
@@ -30,7 +31,6 @@ use settings::SettingsStore;
 use std::time::Duration;
 use ui::prelude::*;
 use util::debug_panic;
-use zed_llm_client::CompletionIntent;
 
 use super::anthropic::count_anthropic_tokens;
 use super::google::count_google_tokens;