(#13642) Move search notice message

Currently the PMT search action assumes the searcher implementation will
connect to the HTTP server defined by
Puppet.settings[:module_repository] when searching for modules on the
Forge. The server defined by Puppet.settings[:module_repository] is then
used in a message printed on the console: Searching #{server} …. This
is a little too close to the implementation and the notice has been
moved closer to where the search is actually taking place.