Switch search-suggest message to use Message::parse()

Switch search-suggest message to use Message::parse()

This was recently made more explicit and use escape() which matches
the english definition, but frwiki (and maybe others) has overridden
these messages on wiki via MediaWiki:search-suggest to include HTML
code.  To get the correct output from that HTML we need to use ::parse()
instead of ::text()

Change-Id: I5251dead7f1262728b4cab5bcfc5b0d1b9acc761