model-conversion : make printing of config values optional (#19681)

model-conversion : make printing of config values optional (#19681)

* model-conversion : make printing of config values optional

This commit updates run-org-model.py to make the printing of model
configuration values optional.

The motivation for this change is that not all models have these
configuration values defined and those that do not will error when
running this script. With these changes we only print the values if they
exist or a default value.

We could optionally just remove them but it can be useful to see these
values when running the original model.