do not default to free text search unless the field has the "text" template

When creating a new script field we default to using the free text searcher, regardless of the selected template.

For certain types of field this prevents the value being displayed, notably "multi userpicker" template, with for example the following script:

import com.atlassian.jira.component.ComponentAccessor

[ComponentAccessor.jiraAuthenticationContext.loggedInUser]