Retain OSM files for ResStock datasets

[ejhw]

Is your feature request related to a problem? Please describe.
A significant fraction of people that email resstock@nrel.gov or post on Unmet hours are struggling with getting the osm or idf files for resstock samples.

From @shorowit:

I was attempting to answer this Unmet Hours question about how to take a 2022 EUSS HPXML file and generate the OpenStudio model, but found it surprisingly difficult. I did go ahead and document how to do it, though I expect it will be too difficult for many users.

Is there a reason we don't include the OpenStudio model alongside the HPXML file in the OEDI zip files?

If we do want to make the process of going from HPXML -> OpenStudio models simpler, a couple improvements would be:

• Update the HPXML file to use relative paths instead of Eagle paths everywhere.
• Include more data files (like the Cambium emissions factors) in the OEDI zip.
  That would mean the user only has to do extra steps related to the EPW weather file.

Describe the solution you'd like
@whiphi92 suggests including an option in the server_directory_cleanup block to retain osm files

Describe alternatives you've considered
See above

Additional context
None

[nmerket]

This already exists. It just wasn't set in the EUSS run.

cc @joseph-robertson @whiphi92