v1.22.0-alpha.1

Changelog since v1.21.X:

• Add v1.20 and v1.21 manifests (#487)
• Migrate the helm chart to /charts repo and update related docs (#478)
• Bump Kubernetes dependencies to v1.22.X and go to 1.16 (#496)

Version Compatibility

Supports Kubernetes clusters on v1.22.X with allowed version skew.