move llvm_enzyme out of rust config, so that llvm_config initialization is preferred

Author: Shourya742

src/bootstrap/src/core/config/config.rs

@@ -795,9 +795,14 @@ impl Config {
                 .collect::<Vec<PathBuf>>(),
         );
 
+        // Though we are applying it here, but the enzyme from llvm should get preference.
+        config.llvm_enzyme =
+            config.llvm_enzyme || config.channel == "dev" || config.channel == "nightly";
+
         config.apply_install_config(toml.install);
         config.apply_gcc_config(toml.gcc);
         config.apply_dist_config(toml.dist);
+        config.apply_llvm_config(toml.llvm);
 
         config.apply_build_config(
             toml.build,
@@ -809,7 +814,6 @@ impl Config {
         );
         config.apply_target_config(toml.target);
         config.apply_rust_config(toml.rust, flags_warnings);
-        config.apply_llvm_config(toml.llvm);
 
         if config.llvm_from_ci {
             let triple = &config.host_target.triple;

src/bootstrap/src/core/config/toml/rust.rs

@@ -619,7 +619,6 @@ impl Config {
             self.rust_randomize_layout = randomize_layout.unwrap_or_default();
             self.llvm_tools_enabled = llvm_tools.unwrap_or(true);
 
-            self.llvm_enzyme = self.channel == "dev" || self.channel == "nightly";
             self.rustc_default_linker = default_linker;
             self.musl_root = musl_root.map(PathBuf::from);
             self.save_toolstates = save_toolstates.map(PathBuf::from);