Populate location metadata from AIP

[slifty]

This issue is captured in more detail at https://permanent.atlassian.net/browse/PER-10156

We want to leverage the location metadata that is provided by the AIP that is produced by Archivematica.

[slifty]

Some useful resources:

• https://exiftool.org/TagNames/
• https://www.archivematica.org/en/docs/archivematica-1.18/user-manual/archival-storage/aip-structure/#aip-structure
• https://www.archivematica.org/en/docs/archivematica-1.18/user-manual/metadata/METS/#mets-schema
• https://www.loc.gov/standards/mets/
• https://loc.gov/standards/mets/mets2.xsd
• https://iptc.org/standards/photo-metadata/iptc-standard/
• https://www.iptc.org/std/photometadata/specification/IPTC-PhotoMetadata

[slifty]

Originally the thinking was that we would extract lat / lng from the AIP and then reverse-geocode somehow, expanding the location metadata in Permanent beyond hat is provided by Archivematica. This is why "location metadata" was being treated as different from other forms of metadata.

After speaking a bit with @cecilia-donnelly and @liam-lloyd there is potentially some change:

1. Location metadata will be loaded from the AIP.
2. We will expand our location metadata fields to include the other standard location metadata attributes (e.g. world region, city, etc).
3. Our location-metadata editing interfaces will be improved to make it easier for a user to populate a consistent and complete set of location information.

This means that AIP ingestion no longer comes with an additional step.

In future we could explore augmenting the location metadata within the Archivematica tool, which could ultimately result in richer metadata coming out of that processing pipeline.

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If this all sounds reasonable, then this issue would actually be closed as wontfix and instead we would create an issue related to the expansion / standardization of the location metadata fields stored in Permanent overall (which would then be mapped to by the metadata-mapping lambda that @liam-lloyd is working on currently)