linkerd/linkerd2 edge-21.3.1

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edge-21.3.1

This edge release is another release candidate, bringing us closer to
stable-2.10.0! It fixes the Helm install/upgrade procedure and ships some new
CLI commands, among other improvements.

• Fixed Helm install/upgrade, which was failing when not explicitly setting
  proxy.image.version
• Added a warning in the dashboard when viewing tap streams from resources that
  don't have tap enabled
• Added the command linkerd viz list to list meshed pods and indicate which can
  be tapped, which need to be restarted before they can be tapped, and which
  have tap disabled
• Similarly, added the command linkerd jaeger list to list meshed pods and
  indicate which will participate in tracing
• Added the --opaque-ports flag to linkerd inject to specify the list of
  opaque ports when injecting pods (and services)
• Simplified the output of linkerd jaeger check, combining the checks for the
  status of each component into a single check
• Changed the destination component to receive the list of default opaque ports
  set during install so that it's properly reflected during discovery
• Moved the level of the proxy server's I/O-related "Connection closed" messages
  from info to debug, which were not providing actionable information