debugger: Fix the JavaScript debug terminal scenario (#33924)

There were a couple of things preventing this from working:

- our hack to stop the node REPL from appearing broke in recent versions
of the JS DAP that started passing `--experimental-network-inspection`
by default
- we had lost the ability to create a debug terminal without specifying
a program

This PR fixes those issues. We also fixed environment variables from the
**runInTerminal** request not getting passed to the spawned program.

Release Notes:

- Debugger: Fix RunInTerminal not working for JavaScript debugger.

---------

Co-authored-by: Cole Miller <cole@zed.dev>

crates/project/src/debugger/locators/cargo.rs

@@ -119,7 +119,7 @@ impl DapLocator for CargoLocator {
             .context("Couldn't get cwd from debug config which is needed for locators")?;
         let builder = ShellBuilder::new(true, &build_config.shell).non_interactive();
         let (program, args) = builder.build(
-            "cargo".into(),
+            Some("cargo".into()),
             &build_config
                 .args
                 .iter()