Redirect to a presigned URL of HEAD for HEAD requests (#35088)

Resolves https://github.com/go-gitea/gitea/issues/35086.

---------

Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

routers/api/packages/conan/conan.go

@@ -492,6 +492,7 @@ func downloadFile(ctx *context.Context, fileFilter container.Set[string], fileKe
 			Filename:     filename,
 			CompositeKey: fileKey,
 		},
+		ctx.Req.Method,
 	)
 	if err != nil {
 		if errors.Is(err, packages_model.ErrPackageNotExist) || errors.Is(err, packages_model.ErrPackageFileNotExist) {