linkerd/linkerd2 edge-21.2.3

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edge-21.2.3

This release wraps up most of the functional changes planned for the upcoming
stable-2.10.0 release. Try this edge release in your staging cluster and
let us know if you see anything unexpected!

• Breaking change: Changed the multicluster Service-export annotation
  from mirror.linkerd.io/exported to multicluster.linkerd.io/export
• Updated the proxy-injector to to set the config.linkerd.io/opaque-ports
  annotation on newly-created Service objects when the annotation is set on
  its parent Namespace
• Updated the proxy-injector to ignore pods that have disabled
  automountServiceAccountToken (thanks @jimil749)
• Updated the proxy to log warnings when control plane components are
  unresolveable
• Updated the Destination controller to cache node topology metadata (thanks
  @fpetkovski)
• Updated the CLI to handle API errors without printing the CLI usage (thanks
  @piyushsingariya)
• Updated the Web UI to only display the "Gateway" sidebar link when the
  multicluster extension is active
• Fixed the Web UI on Chrome v88 (thanks @kellycampbell)
• Improved install and uninstall behavior for extensions to prevent
  control-plane components from being left in a broken state
• Docker images are now hosted on the cr.l5d.io registry
• Updated base docker images to buster-20210208-slim
• Updated the Go version to 1.14.15
• Updated the proxy to prevent outbound connections to localhost to protect
  against traffic loops