Rollup merge of #121228 - onur-ozkan:fix-clippy-stamp-bug, r=albertlarsan68

create stamp file for clippy

Due to missing stamp file, we were downloading (and applying nix patches if enabled) continuously every time `Config::download_clippy` was called. This change fixes that by creating stamp file at the end of the function.

Fixes #119442

src/bootstrap/src/core/download.rs

@@ -399,6 +399,7 @@ pub(crate) fn download_clippy(&self) -> PathBuf {
             self.fix_bin_or_dylib(&cargo_clippy.with_file_name(exe("clippy-driver", host)));
         }
 
+        self.create(&clippy_stamp, date);
         cargo_clippy
     }