For objects accessioned via globus and for which individual file sizes (either some or all in an object) are not available, we do not want to show 0 in the collection item list table. Instead we will show a message (TBD by Astrid, something like "not available*"), and then at the bottom of the page, we will have a legend indicating why it's not available (TBD something like "* = items deposited through Globus do not have file sizes computed")

Note it may be possible (based on #3231) for some files to have no file size and some files to have a file size. In this case, we still do no want to show the total object size, because it will not be accurate. So the determination of whether to show the total file size or not is not "0" but maybe if globus was used to upload files at any point (again, based on what we learn in #3231)

Note: do the investigation in #3231 first, because the results of that will determine how we implement this