[Release] Katib 0.11 release

[andreyvelich]

/kind feature

This is the track issue for Katib 0.11 release.
I think most of the changes are already in upstream.

TODOs list:

• Add Katib release script: Katib release process #1466.
• Sync Kubeflow manifest with Katib manifest.
• Generate manifest for the new Katib UI: Create manifests for new Katib UI #1469.
• Update training containers in Notebook examples: Update training container images in Notebook examples #1475.
• Katib webhooks doc: [Documentation] Katib webhook information #1266.
• Update boilerplate: Add script to update boilerplate #1491.
• Fix gRPC build script: Fix gRPC manager build script #1492.

@gaocegege @johnugeorge @yanniszark @kimwnasptd Do we want to include anything else to this release ?

/area release
/priority p1

[kimwnasptd]

@andreyvelich could we also include the manifests for the new UI #1469?

[andreyvelich]

@kimwnasptd, sure.

[andreyvelich]

Katib 0.11.0 has been released: https://github.com/kubeflow/katib/releases/tag/v0.11.0.
We can close it.