Add ageCitations

[CarolineDenis]

Fixes #5340

Checklist

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

Testing instructions

• verify age citations (for both relative and absolute) are present in the data-model tab
• verify you can add it to view def

[CarolineDenis]

TODO:

• rename migration once the other ones in 9.8 are merged in prod

Just a reminder: when you pull production and rename the migration later, make sure to regenerate the frontend types as prod will have new frontend types at that point.

[sharadsw]

Looks good! Just a reminder: when you pull production and rename the migration later, make sure to regenerate the frontend types as prod will have new frontend types at that point.

[emenslin]

Testing instructions

• verify age citations (for both relative and absolute) are present in the data-model tab
• verify you can add it to view def

The age citations relationships are not present in the schema config for absolute and relative age, however, in the age citations you can see the absolute or relative age relationship. I know this wasn't a check but I assume it should be present in the schema config if it is present in the data model and one side of the relationship shows it.

chrome_rG2tENsj7d.mp4