Account for project filtering when checking the inRole predicate

The inRole condition, provided by JQL functions such as lastComment, currently requires ScriptRunner to iterate through every project role defined on the instance - this can be time consuming if the number of such roles is high. However, in cases where some other part of the JQL query restricts the applicable projects (as indicated by QueryCreationContext#getDeterminedProjects), ScriptRunner need only consider the roles for those projects, which could represent a considerable saving on time.