proxy: v2.119.0 (#5200)

This release modifies the default idle timeout to 5s for outbound
clients and 20s for inbound clients. This prevents idle clients from
consuming memory at the cost of performing more discovery resolutions
for periodic but infrequent traffic. This is intended to reduce the
proxy's memory footprint, especially on Prometheus instances.

The proxy's *ring* and rustls dependencies have also been updated.

---

* Update *ring* and rustls dependencies (linkerd/linkerd2-proxy#735)
* http: Configure client connection pools (linkerd/linkerd2-proxy#734)

.proxy-version

@@ -1 +1 @@
-v2.118.0
+v2.119.0