enforce explanation for necessary nolints and fix bugs (#34883)

Follows up https://github.com/go-gitea/gitea/pull/34851

---------

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

modules/markup/mdstripper/mdstripper.go

@@ -46,7 +46,7 @@ func (r *stripRenderer) Render(w io.Writer, source []byte, doc ast.Node) error {
 				coalesce := prevSibIsText
 				r.processString(
 					w,
-					v.Text(source), //nolint:staticcheck
+					v.Text(source), //nolint:staticcheck // Text is deprecated
 					coalesce)
 				if v.SoftLineBreak() {
 					r.doubleSpace(w)