Fix mime type on file import and move alias files to temp folder

hyrax/app/actors/hyrax/actors/file_actor.rb

hyrax/app/jobs/attach_files_to_work_job.rb

hyrax/app/jobs/characterize_job.rb

hyrax/app/jobs/ingest_job.rb

hyrax/app/models/bulkrax/file_factory.rb

hyrax/app/models/crc_dataset.rb

...x/app/views/hyrax/file_sets/media_display/_image.html.erb