Hide vendoring and copyright in GHA group

These two steps are currently the most verbose steps in a dist-linux
build, which makes it harder to find more interesting parts. Hide them
in a group like most things.

src/bootstrap/src/core/build_steps/run.rs

@@ -263,6 +263,8 @@ impl Step for GenerateCopyright {
             cache_dir
         };
 
+        let _guard = builder.group("generate-copyright");
+
         let mut cmd = builder.tool_cmd(Tool::GenerateCopyright);
         cmd.env("CARGO_MANIFESTS", &cargo_manifests);
         cmd.env("LICENSE_METADATA", &license_metadata);

src/bootstrap/src/core/build_steps/vendor.rs

@@ -74,7 +74,7 @@ impl Step for Vendor {
     /// This function runs `cargo vendor` and ensures all required submodules
     /// are initialized before vendoring begins.
     fn run(self, builder: &Builder<'_>) -> Self::Output {
-        builder.info(&format!("Vendoring sources to {:?}", self.root_dir));
+        let _guard = builder.group(&format!("Vendoring sources to {:?}", self.root_dir));
 
         let mut cmd = command(&builder.initial_cargo);
         cmd.arg("vendor");