EDB Postgres for Kubernetes 1.16.3 release notes v1

This release of EDB Postgres for Kubernetes includes the following:

TypeDescription
Upstream mergeMerged with community CloudNativePG 1.16.3. See the community Release Notes.
EnhancementIntroduces leaseDuration and renewDeadline parameters in the controller manager to enhance configuration of the leader election in operator deployments.
EnhancementImproves the mechanism that checks that the backup object store is empty before archiving a WAL file for the first time. A new file called .check-empty-wal-archive is placed in the PGDATA immediately after the cluster is bootstrapped. It is removed after the first WAL file is successfully archived.
SecurityExplicitly sets permissions of the instance manager binary that is copied in the distroless/static:nonroot container image, by using the nonroot:nonroot user.
Bug fixDrops any active connection on a standby after it is promoted to primary.
Bug fixHonors MAPPEDMETRIC and DURATION metric types conversion in the native Prometheus exporter.