debugger: More tidy up for SSH (#28993)

Split `locator` out of DebugTaskDefinition to make it clearer when
location needs to happen.

Release Notes:

- N/A

---------

Co-authored-by: Anthony Eid <hello@anthonyeid.me>
Co-authored-by: Anthony <anthony@zed.dev>
Co-authored-by: Cole Miller <m@cole-miller.net>

crates/eval/Cargo.toml

@@ -15,7 +15,6 @@ clap.workspace = true
 client.workspace = true
 collections.workspace = true
 context_server.workspace = true
-dap.workspace = true
 dirs = "5.0"
 env_logger.workspace = true
 extension.workspace = true

crates/eval/src/example.rs

@@ -3,7 +3,6 @@ use agent::{ThreadEvent, ThreadStore};
 use anyhow::{Context as _, Result, anyhow};
 use assistant_tool::ToolWorkingSet;
 use client::proto::LspWorkProgress;
-use dap::DapRegistry;
 use futures::channel::mpsc;
 use futures::{FutureExt, StreamExt as _, select_biased};
 use gpui::{App, AppContext as _, AsyncApp, Entity, Task};
@@ -243,7 +242,6 @@ impl Example {
             app_state.node_runtime.clone(),
             app_state.user_store.clone(),
             app_state.languages.clone(),
-            Arc::new(DapRegistry::default()),
             app_state.fs.clone(),
             None,
             cx,