debugger: Handle the envFile setting for Go (#33666)

Fixes #32984

Release Notes:

- The Go debugger now respects the `envFile` setting.

crates/dap_adapters/Cargo.toml

@@ -25,7 +25,9 @@ anyhow.workspace = true
 async-trait.workspace = true
 collections.workspace = true
 dap.workspace = true
+dotenvy.workspace = true
 futures.workspace = true
+fs.workspace = true
 gpui.workspace = true
 json_dotpath.workspace = true
 language.workspace = true