Combine RestApiPrivilegesEvaluator and RestApiAdminPrivilegesEvaluator to RestApiAuthorizationEvaluator#6072

cwperks wants to merge 3 commits intoopensearch-project:mainopensearch-project/security:mainfrom

cwperks:rest-api-refactorcwperks/security:rest-api-refactorCopy head branch name to clipboard