Fix: `scale` creates legacy PostgreSQL regardless of the current channel
This MR fixes the problem recently discovered by @hfyngvason.
auto-deploy scale is the API to scale up/down the deployment. This should affect only the replica count of the deployments and should not affect the other properties therefore --reuse-values option is specified to helm upgrade.
However, this --reuse-values option doesn't work with sub-chart condition, therefore, always true is being passed so far. This creates legacy PostgreSQL instance into the deployment even if it's not necessary.
Edited by Shinya Maeda