Problem: aip ingest date is not easy to find when using indexless mode

[scollazo]

Please describe the problem you'd like to be solved
I want to be able to know the size of an AIP, or the aggregate size of a list of AIPs (let's say, the ones ingested between two dates)

Describe the solution you'd like to see implemented

Add a new field to storage service locations_package that stores the AIP ingest date

Describe alternatives you've considered

• Retrieve such info from elasticsearch (not an option if not using the index)
• Parse archivematica logs to identify the date of transfers

Additional context
This feature would be useful for creating reports showing how many aips/gigabytes have been ingested in a period of time

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[tw4l]

Related to #731 - if we add accurate stored dates in the Storage Service, we could use those in the Archival Storage tab whether or not there's a date in Elasticsearch

[tw4l]

Milestoned for 1.14 after discussing with @sromkey

[replaceafill]

Verified this by creating a compressed AIP and an uncompressed AIP and checking their stored_date column in the Storage Service database being populated correctly.