feat: Add storage provider for remote files

[mesemus]

Description

This PR introduces a storage provider for remote files and fixes related issues in the file handling workflow.

The implementation adds a storage factory capable of opening/accessing remote files on the record level. This makes remote files behave exactly the same as local files and fixes issues related to checksum calculation and archive generation when remote files are present - #672.

Note

This PR depends on inveniosoftware/invenio-files-rest#348

Checklist

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