ENG-8855 Accepting BambooHR data as custom attributes via HRIS integration

Feature flag

As a 15Five and BambooHR user, I expect to be able to sync data for certain

Bamboo fields to 15Five as custom people attributes so that I can apply more

HRIS-level data to my employees in 15Five.

The fields [[https://documentation.bamboohr.com/docs/list-of-field-names][found here]] originating from BambooHR should be recognizable by our

system and, when identified in a sync, we will create a custom people attribute

for that field.

If a user attempts to sync information for a LinkedIn profile URL — not

specifically called out as a field, but it is available as a [[https://documentation.bamboohr.com/docs/webhooks][webhook]] — we will

block that field from being synced. (It is anticipated that the Best Self

Profile squad will be using this as a native/default field in 15Five.)

Copy for error handling: Data for fieldname could not be synced because it is

already being used by 15Five.