Update Federal Agency and SO tables, and fill both

[abroddrick]

Issue description

Now that we have the complete list of senior officials that was made in #2097, we can make a script to populate this table. We will eventually be populating the organizations/porfolio via another script so it is worth while for use to also store federal agency along with the AO. When a federal portfolio is being manually made in django admin, having a link between federal agency and SO (that can be null) would allow us to auto populate the SO value based on the the agency. For instance, if a user was making a portfolio for DHS, they would select the DHS agency name and then the SO would autofill on their screen. That said, while we make this script let's also make sure that the agency foreign key field gets properly added and filled as well.

Acceptance criteria

• modify the senior official table to include a federal agency foreign key field that can be null (this is to allow us to add state/other orgs later without them needing to be federal orgs)
• modify the federal agency table such that it has a field "initials" and a boolean field "is FCEB". "is FCEB" should default to false.
• the script reads the file linked in Finalize list of Senior Officials (SOs) for federal agencies #2097 and fills the SO table with the correct link to it's corresponding federal agency and fills all the name/ email and role values. (note "title" on the SO table correlates to "role/position" in the csv)
• This script (or a separate one) should also update the federal agency table with the values for "initials" and for "is FCEB" (note "is FCEB" should correlate to the status column and is true where that status is filled in.)
• Test this on litterbox

Additional context

No response

Links to other issues

relates to #2300

[abroddrick]

Tentatively adding to sprint 50 as this is continues on with the org model but doesn't conflict with the user interface changes and is low risk for merge conflicts

[abroddrick]

@vickyszuchin don't let people pull this one in while I'm gone. There needs to be some edits here based on a convo about adding more fields to this same table

[abroddrick]

Adding refinement as the AC here needs to change, adding myself so I remember to update it tomorrow. @zandercymatics I will add you back when I am done.