workspace: add Rust EFI infrastructure

This bumps rules_rust, cleans up the toolchains with the new version.
It also adds the Prost codegen to "normal" crate set as well as a new
crate set specific to EFI. This is separate because of Rust no-std's
dependence on create feature tags.

Change-Id: Ie76e66ee83696948391420ca3b011a3a71258690
Reviewed-on: https://review.monogon.dev/c/monogon/+/2202
Tested-by: Jenkins CI
Reviewed-by: Serge Bazanski <serge@monogon.tech>
diff --git a/third_party/rust/cargo/remote/BUILD.parking_lot-0.12.1.bazel b/third_party/rust/cargo/remote/BUILD.parking_lot-0.12.1.bazel
index 2af0afa..01d9011 100644
--- a/third_party/rust/cargo/remote/BUILD.parking_lot-0.12.1.bazel
+++ b/third_party/rust/cargo/remote/BUILD.parking_lot-0.12.1.bazel
@@ -51,8 +51,8 @@
     version = "0.12.1",
     # buildifier: leave-alone
     deps = [
-        "@raze__lock_api__0_4_9//:lock_api",
-        "@raze__parking_lot_core__0_9_6//:parking_lot_core",
+        "@raze__lock_api__0_4_10//:lock_api",
+        "@raze__parking_lot_core__0_9_8//:parking_lot_core",
     ],
 )