[gardener-extensions]

Action Required

[DEVELOPER] The generic health check actuator can now take a pre-check function that is performed before the health check is executed. If it returns false then the health check will be skipped. This accommodates extensions that only want to perform their health checks conditionally based on the object's or the cluster's settings. (#627, @rfranzke)
[DEVELOPER] All methods of pkg/webhook/controlplane/genericmutator.Ensurer now have an additional argument which can optionally contain the old value of the object. If the admission request was CREATE this value is always nil. (#622, @mvladev)

[USER] An issue in the machine reconciliation has been fixed that caused the reconciliation being stuck in some cases where a previously broken worker configuration (e.g., due to the specification of machine types that are not available in certain availability zones) has been corrected. (#626, @rfranzke)
[USER] Allow force deletion of machines incase of cluster hibernation (#609, @prashanth26)
[OPERATOR] Credentials used by machine-controller-manager are now updated during worker deletion. (#606, @EmoinLanyu)
[OPERATOR] An issue causing running terraformer container to leak on the Node without associated Pod resource is now fixed. This will prevent multiple containers to execute apply/destroy commands simultaneously in some cases (especially for long running terraformer Pods). (#605, @ialidzhikov)
[DEVELOPER] The Terraformer functions IsStateEmpty, NumberOfResources, CleanupConfiguration, and GetState are now exported. (#610, @rfranzke)
[DEVELOPER] github.com/gardener/gardener dependency updated to v1.1.0 (#608, @mvladev)