Support special remote trust level setting

[mih]

Without a dataset being published on dataverse (not just uploaded as a draft), any file can be removed with the click of a button. It would make sense to configure any and all now siblings with untrusted.

If we happen to start supporting finalizing a dataset (un-draft it), we could then reconfigure the trust level.

However, any new upload and therefore re-drafting would bring us back to untrusted.

So maybe #101 is a better approach. If and only if a particular version is identified for data retrieval it would make sense to label it trusted. This would then likely happen on-clone.

[adswa]

So that would mean setting the local config remote.<name>.annex-trustlevel to untrusted, even outside of export mode?