ords_installer_privileges.SQL - Note-1:

ords_installer_privileges.SQL, This script is used when you do not want to use SYS AS SYSDBA to install, upgrade, validate and uninstall ORDS for Oracle PDB or Oracle 11g.

ords_installer_privileges.SQL - Note-2:

Starting with ORDS 19.2 release, the Oracle REST Data Services installation archive file contains a script, ords_installer_privileges.sql, which is located in the installer folder. The script provides the assigned database user the privileges to install, upgrade, validate and uninstall ORDS in Oracle Pluggable Database or Oracle 11g.