Enable transformation spec for rust with static linking

Summary:
Transformation specs should also be available for Rust (mostly to migrate off link group-based APIs that is currently rolled out for rust too). Thankfully this is easy to configure because all we should do is to propagate the values and all handling will work out of the box.

Passing transformation spec context to part that handles static linkage

Reviewed By: dtolnay

Differential Revision: D83559463

fbshipit-source-id: bf7f71152cec516c3d12d2a36657f0cb925b0520

Author: Nikita Patskov

prelude/rust/build.bzl

@@ -36,6 +36,10 @@ load(
     "get_output_flags",
     "get_shared_library_name_linker_flags",
 )
+load(
+    "@prelude//cxx:transformation_spec.bzl",
+    "TransformationSpecContext",  # @unused Used as a type
+)
 load(
     "@prelude//linking:link_info.bzl",
     "LibOutputStyle",  # @unused Used as a type
@@ -392,6 +396,7 @@ def rust_compile(
         # output of the action is going to be depended on
         infallible_diagnostics: bool = False,
         rust_cxx_link_group_info: RustCxxLinkGroupInfo | None = None,
+        transformation_spec_context: TransformationSpecContext | None = None,
         profile_mode: ProfileMode | None = None) -> RustcOutput:
     toolchain_info = compile_ctx.toolchain_info
 
@@ -563,7 +568,7 @@ def rust_compile(
                 link_strategy = params.dep_link_strategy,
                 swiftmodule_linkable = None,
                 prefer_stripped = False,
-                transformation_spec_context = None,
+                transformation_spec_context = transformation_spec_context,
             )
 
         if params.crate_type in (CrateType("cdylib"), CrateType("dylib")):

prelude/rust/rust_binary.bzl

@@ -216,6 +216,7 @@ def _rust_binary_common(
         extra_flags = extra_flags,
         allow_cache_upload = allow_cache_upload,
         rust_cxx_link_group_info = rust_cxx_link_group_info,
+        transformation_spec_context = transformation_spec_context,
         incremental_enabled = ctx.attrs.incremental_enabled,
     )
 
@@ -331,6 +332,7 @@ def _rust_binary_common(
             extra_flags = extra_flags,
             infallible_diagnostics = True,
             incremental_enabled = incr,
+            transformation_spec_context = transformation_spec_context,
         )
         clippy_artifacts[incr] = rust_compile(
             ctx = ctx,
@@ -341,6 +343,7 @@ def _rust_binary_common(
             extra_flags = extra_flags,
             infallible_diagnostics = True,
             incremental_enabled = incr,
+            transformation_spec_context = transformation_spec_context,
         )
 
     providers = [RustcExtraOutputsInfo(