Interactive cells change value

[juanca]

Motivation

We need interactive cells! We don't really have usages of our Autocompleter in other parts of the app so I'm taking the liberty to do a breaking change and align the value prop with the same shape of data as our backend API (i.e. just an ID).

https://www.pivotaltracker.com/story/show/179729086

Acceptance Criteria

• Autocompleter still works
• Select still works
• CustomFieldSingleChoice still works

PR upkeep checklist

• [x] Change log entry
• [x] Label(s)
• [x] Assignee(s)
• [x] Deployment URL: https://mavenlink.github.io/design-system/interactive-cells-change-value/
• [x] (When ready for review) Reviewer(s)
• [x] Green Bigmaven CI check
• [ ] DevQA on Bigmaven staging (e.g. does the work need to be imported in the internal design system?)

[juanca]

Looks like I need to update the imperative handle for an autocompleter to also return the id of the selected value. I need to consider what happens when an old value is already in the database. Do we run a backfiller? 🤔