Fix N+1 queries in `/api/v1/getallfacilities/`

[sainak]

Sentry Issue: CARE-M3 Sentry Issue: CARE-KX

Transaction Name	/api/v1/getallfacilities/
Parent Span	django.view - facility-list
Repeating Spans (0)	db - SELECT COUNT(*) AS __count FROM facility_bed WHERE (facility_bed.deleted = %s AND facility_bed.facility_id = %s)
	db - SELECT users_ward.id, users_ward.local_body_id, users_ward.name, users_ward.number FROM users_ward WHERE users_ward.id = %s
	db - SELECT COUNT(*) AS __count FROM facility_patientregistration WHERE (facility_patientregistration.deleted = %s AND facility_patientregistration.facility_id = %s AND facility_patientregistration.is_active = %s)

Sentry Issue: CARE-M2

Transaction Name	/api/v1/facility/
Parent Span	django.view - facility-list
Repeating Spans (0)	db - SELECT COUNT(*) AS __count FROM facility_patientregistration WHERE (facility_patientregistration.deleted = %s AND facility_patientregistration.facility_id = %s AND facility_patientregistration.is_active = %s)
	db - SELECT COUNT(*) AS __count FROM facility_bed WHERE (facility_bed.deleted = %s AND facility_bed.facility_id = %s)