An * is appended to all search terms by default

While testing https://folio-org.atlassian.net/browse/MODCXEKB-64, I observed that an * gets appended to all terms entered in the Codex UI.

This gets passed on to the the MUX and subsequently on to mod-codex-ekb.

This behavior is default for shared search and sort component and what is wanted for RMB based back end modules to do a prefix type search.

This default behavior is NOT what is wanted by backend Codex KB module.

For this module, we are using advanced search capabilities of the KB as described below
https://developer.ebsco.com/guides/advancedsearch

Users should have the flexibility to enter an * in the search box or not to indicate if they want to perform a wildcard/prefix search.