feat(forms): use ordinal for attachment ordering

[grantfitzsimmons]

Fixes #8010

This PR orders attachments by ordinal rather than sorting them by ID.

SELECT
  coa.CollectionObjectAttachmentID,
  coa.TimestampCreated,
  coa.Ordinal,
  a.origFilename
FROM collectionobjectattachment AS coa
LEFT JOIN attachment AS a
  ON a.AttachmentID = coa.AttachmentID
WHERE coa.CollectionObjectID = 1062
ORDER BY coa.Ordinal;

Checklist

• Self-review the PR after opening it to make sure the changes look good and
  self-explanatory (or properly documented)
• Add automated tests

Testing instructions

• Find or create an object (e.g. Collection Object, Agent, etc.) with multiple attachments
• Modify the ordinal field values in the *attachment records to new values so that they are in a different position (e.g. change 0 to 5, 1 to 2, 3 to 1) then save
• Reload the page
• Verify that the attachments appear in ascending order based on the ordinal values