Fixes #3290

Adds an organization name column to the submission table. To effect that
change, a new unique block needed to be added. I did test that the
column will not show up when added to
`SUBSMISSION_TABLE_EXCLUDED_FIELDS`

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Co-authored-by: Ghulam Murtaza <gmurtaza@opentechstrategies.com>
Co-authored-by: Frank Duncan <frank@kank.net>
Co-authored-by: Fredrik Jonsson <frjo@xdeb.org>