Linkerd - edge-23.12.2

edge-23.12.2

This edge release includes a restructuring of the proxy's balancer along with
accompanying new metrics. The new minimum supported Kubernetes version is 1.22.

• Restructured the proxy's balancer (#11750): balancer changes may now occur
  independently of request processing. Fail-fast circuit breaking is enforced on
  the balancer's queue so that requests can't get stuck in a queue indefinitely.
  This new balancer is instrumented with new metrics: request (in-queue) latency
  histograms, failfast states, discovery updates counts, and balancer endpoint
  pool sizes.
• Changed how the policy controller updates HTTPRoute status so that it doesn't
  affect statuses from other non-linkerd controllers (#11705; fixes #11659)