property refs can only use their own resource in iac

[jhsinger-klotho]

certain property refs like a NLB's Uri need to reference the upstream api integration to append the route to their dns name. This currently isnt possible which prevents the iac from being correct

another area which will need to solve this is the aws logging config map
we have something like

              output.conf: |
                [OUTPUT]
                    Name cloudwatch_logs
                    Match   kube.*
                    region {{ (downstream "aws:region" .Target) }}#Name
                    log_group_name /fargate/{{ .Target }}#ClusterName
                    log_stream_prefix from-fluent-bit-
                    log_retention_days 60
                    auto_create_group true

previoius code https://github.com/klothoplatform/klotho/blob/main/pkg/infra/iac2/templates_compiler.go#L740