[PDI-12812] - implementing exportResources for PMR.

Should be able to use the same pattern as [JobEntryTrans](https://github.com/pentaho/pentaho-kettle/blob/c0fc92e4221a82a8a37ab6a1de48527368994e67/engine/src/org/pentaho/di/job/entries/trans/JobEntryTrans.java#L1295)