deposit: version field should have a character limit

[carlinmack]

Very long version strings prevent registration with DataCite

datacite.errors.DataCiteServerError: {"status":400,"title":"Mysql2::Error: Data too long for column 'version_info' at row 1"}

(I couldn't find in a brief search what this length is, but I'd guess 255 chars)

While other instances might not use DataCite, version strings that are very long look bad in the UI (as the string is rendered in a pill in the search results), and this information is usually something which is better suited to a Note (additional description) which the user might not be aware of

For context, these long version strings are usually something like version 3.1 - submitted to ACML conference but missing correct co-author attribution