We should make changes to the index_build_coordinator to support using TenantId objects. Most of the work seems to be done within the methods however we should still pass a TenantId object instead of a StringData.
 
abortTenantIndexBuilds is still a StringData when calling ClonerUtils::isDatabaseForTenant which will be addressed in SERVER-70027 which should be done once SERVER-71187 is merged to master.

We are also going to use SERVER-71669 to clean-up some method that had to be re-defined (instead of replaced) to use a TenantId object. Part of that ticket will be to remove the old methods (still using StringData) to leave room for only using the TenantId methods once the tenant migration code switches to using only TenantId objects.