Replace all instances of fmt.Errorf(%v) with fmt.Errorf(%w) (#21551)

Found using
`find . -type f -name '*.go' -print -exec vim {} -c
':%s/fmt\.Errorf(\(.*\)%v\(.*\)err/fmt.Errorf(\1%w\2err/g' -c ':wq' \;`

Co-authored-by: 6543 <6543@obermui.de>
Co-authored-by: Andrew Thornton <art27@cantab.net>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

routers/web/repo/repo.go

@@ -90,7 +90,7 @@ func checkContextUser(ctx *context.Context, uid int64) *user_model.User {
 	}
 
 	if err != nil {
-		ctx.ServerError("GetUserByID", fmt.Errorf("[%d]: %v", uid, err))
+		ctx.ServerError("GetUserByID", fmt.Errorf("[%d]: %w", uid, err))
 		return nil
 	}