Fix lazy object store initialization for distribute object stores.

[jmchilton]

Broken I guess with collection parameters and not really anything to do with collections - probably why we sometimes see it in the tool submission form also.

This fix should also speed up tool submission on main since the whole point was to avoid was to avoid disk access in web and scheduler threads, and this disk access snuck as part of the tool action code.

Fix #7368

[mvdbeek]

Those errors look at least partially relevant. I also stumbled on this divergent path in the object store code a couple times before -- when calling get_filename the disk-based object stores creates and returns a path, while the distributed object stores will try all available object stores and raise an exception if the path doesn't exist. We should really unify this.

[mvdbeek]

Merged as part of #7939