bazel: Add rustc source files

This is required to support rust analyzer for IDEs

Signed-off-by: Keith Smiley <[email protected]>

Author: keith

bazel/dependency_imports.bzl

@@ -23,7 +23,7 @@ def envoy_dependency_imports(go_version = GO_VERSION):
     apple_rules_dependencies()
     pip_dependencies()
     rules_rust_dependencies()
-    rust_register_toolchains()
+    rust_register_toolchains(include_rustc_srcs = True)
     upb_deps()
     antlr_dependencies(472)
     proxy_wasm_rust_sdk_dependencies()