Rust/bazel: Port to bzlmod.

This gets rid of our last workspace dependency.
In particular, this change also gets rid of the checked-in extra
lock files that took forever to generate.

misc/bazel/rust.bzl

@@ -0,0 +1,23 @@
+load("@rules_rust//rust:defs.bzl", "rust_binary")
+load("@semmle_code//buildutils-internal:glibc_symbols_check.bzl", "glibc_symbols_check")
+load("@semmle_code//buildutils-internal:lipo.bzl", "universal_binary")
+
+def codeql_rust_binary(
+        name,
+        target_compatible_with = None,
+        visibility = None,
+        symbols_test = True,
+        **kwargs):
+    rust_label_name = name + "_single_arch"
+    universal_binary(
+        name = name,
+        dep = ":" + rust_label_name,
+        target_compatible_with = target_compatible_with,
+        visibility = visibility,
+    )
+    rust_binary(
+        name = rust_label_name,
+        **kwargs
+    )
+    if symbols_test:
+        glibc_symbols_check(name = name + "symbols-test", binary = name)