Add `vendor_statistics_identifier` to allocation

Issue

• add field (migration)
• add field to show/edit pages
• do csv import for westlaw
• create report for vendor stats load

Report routes

Requires galileo_admin authentication

https://admin.galileo.usg.edu/reports/vendor_statistics_identifier_for_stats.csv?resource_code=crwl

Requires that the request come from an authorized ip (like from galstats.galib.uga.edu)

https://admin.galileo.usg.edu/vendor_statistics_identifier_for_stats/crwl