linkerd/linkerd2 edge-21.2.1

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edge-21.2.1

This edge release continues improving the proxy's diagnostics and also avoids
timing out when the HTTP protocol detection fails. Additionally, old resource
versions were upgraded to avoid warnings in k8s v1.19. Finally, it comes with
lots of CLI improvements detailed below.

• Improved the proxy's diagnostic metrics to help us get better insights into
  services that are in fail-fast
• Improved the proxy's HTTP protocol detection to prevent timeout errors
• Upgraded CRD and webhook config resources to get rid of warnings in k8s v1.19
  (thanks @mateiidavid!)
• Added viz components into the Linkerd Health Grafana charts
• Had the tap injector add a viz.linkerd.io/tap-enabled annotation when
  injecting a pod, which allowed providing clearer feedback for the linkerd tap command
• Had the jaeger injector add a jaeger.linkerd.io/tracing-enabled annotation
  when injecting a pod, which also allowed providing better feedback for the
  linkerd jaeger check command
• Improved the linkerd uninstall command so it fails gracefully when there
  still are injected resources in the cluster (a --force flag was provided
  too)
• Moved the linkerd profile --tap functionality into a new command linkerd viz profile --tap, given tap now belongs to the viz extension
• Expanded the linkerd viz check command to include data-plane checks
• Cleaned-up YAML in templates that was incompatible with SOPS (thanks
  @tkms0106!)