How to categorize this issue?

/area dev-productivity usability
/kind enhancement

What would you like to be added:

Let's introduce a new core.gardener.cloud/v1 API version including all resources from the core.gardener.cloud API group.

Why is this needed:

The new API version should drop deprecated fields/mechanisms, remove inconsistencies, and move to a stable API for the foreseeable future.

API change proposals:

• When introducing a new API version for Shoot and Seed, consider reusing the same VPA type for VPA configuration options. At the time of writing this, Shoot VPA type contains many fields which are also applicable for the Seed and Garden VPA installations. However, due to reasons how the API evolved over time, only a small subset of these fields are present for Seed VPA type.
• ...

Steps:

• Bootstrap core.gardener.cloud/v1 API version: Introduce core.gardener.cloud/v1.ControllerDeployment API #9771
• Graduate BackupBucket API
• Graduate BackupEntry API
• Graduate CloudProfile API
• Graduate ControllerDeployment API: Introduce core.gardener.cloud/v1.ControllerDeployment API #9771
• Graduate ControllerInstallation API
• Graduate ControllerRegistration API
• Graduate ExposureClass API
• Graduate InternalSecret API
• Graduate NamespacedCloudProfile API
• Graduate Project API
• Graduate Quota API
• Graduate SecretBinding API
• Graduate Seed API
• Graduate Shoot API
• Graduate ShootState API
• Drop core.gardener.cloud/v1beta1 API version