v2.175.0

This release alters the policy-related labels that the proxy sets on inbound traffic:

* The `srv_kind` label is set with a value of "default" or "server",
  depending on whether the `srv_name` label correponds to a default
  policy or a `Server` resource. `srv_name` no longer includes a
  "default:" prefix for default policies.
* The `saz_name` label is removed, replaced by `authz_kind` and
  `authz_name` labels. Similarly, the `authz_kind` label is either
  `default` or `serverauthorization`, and the `authz_name` label never
  includes a "default:" prefix.