Ask `rust_register_toolchain` for `dev_components` (e.g. `rustc_driver`).

PiperOrigin-RevId: 524091270
diff --git a/WORKSPACE b/WORKSPACE
index 35c5537..a8911a4 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -43,7 +43,9 @@
 rust_register_toolchains(
     edition = "2021",
     iso_date = "2022-07-07",
-    version = "nightly",)
+    version = "nightly",
+    dev_components = True,
+)
 
 load("@rules_rust//crate_universe:repositories.bzl", "crate_universe_dependencies")