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

[sainak]

Sentry Issue: CARE-M5

Transaction Name	/api/v1/resource/
Parent Span	django.view - resource-request-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)