debugger beta: Fix regression where we sent launch args twice to any dap (#31325)

This regression happens because our tests weren't properly catching this
edge case anymore. I updated the tests to only send the raw config to
the Fake Adapter Client.

Release Notes:

- debugger beta: Fix bug where launch args were sent twice

crates/project/src/debugger/dap_store.rs

@@ -50,7 +50,7 @@ use std::{
     sync::{Arc, Once},
 };
 use task::{DebugScenario, SpawnInTerminal, TaskTemplate};
-use util::{ResultExt as _, merge_json_value_into};
+use util::ResultExt as _;
 use worktree::Worktree;
 
 #[derive(Debug)]
@@ -407,14 +407,12 @@ impl DapStore {
         cx.spawn({
             let session = session.clone();
             async move |this, cx| {
-                let mut binary = this
+                let binary = this
                     .update(cx, |this, cx| {
                         this.get_debug_adapter_binary(definition.clone(), session_id, console, cx)
                     })?
                     .await?;
 
-                merge_json_value_into(definition.config, &mut binary.request_args.configuration);
-
                 session
                     .update(cx, |session, cx| {
                         session.boot(binary, worktree, dap_store, cx)