test: fix module loading error for AIX 7.1

AIX 7.1 appears to return a different error message compared to AIX 6.1.

PR-URL: https://github.com/nodejs/node/pull/25418


Reviewed-By: Beth Griggs <Bethany.Griggs@uk.ibm.com>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: George Adams <george.adams@uk.ibm.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>