[Multi-Tenant] `auth` tenant service

[njlie]

The authorization server should have a simple tenant service to create, read, update, and delete tenants.

CreateOptions {
  id: string // not generated by auth server, but correlates to id for tenant on backend service
  idpConsentUrl: string
  idpSecret: string
}

TenantService {
  create: (input: CreateOptions) => Tenant
  get: (id: string) => Tenant
  update: (id: string, input: { ...tenantFields}) => Tenant
  delete: (id: string) => boolean
}

• Create auth tenant service and add it to IoC container
• create function
• get function
• update function
• delete function

Prerequisites

• [Multi-Tenant] auth tenants table #3113