proxy: v2.214.0

* Add a .codecov.yml (linkerd/linkerd2-proxy#2527)
* stack: Add BoxCloneSyncService (linkerd/linkerd2-proxy#2523)
* ci: Compute coverage over all tests (linkerd/linkerd2-proxy#2528)
* stack-metrics: Implement Clone for TrackService (linkerd/linkerd2-proxy#2524)
* ci: Fetch tarpaulin binary instead of compiling (linkerd/linkerd2-proxy#2532)
* ci: Enable coverage on main and all PRs (linkerd/linkerd2-proxy#2533)
* test: Cleanup consecutive_failures_accrue (linkerd/linkerd2-proxy#2531)
* test: Improve error reporting in gauges_endpoints (linkerd/linkerd2-proxy#2530)
* test: Cleanup outbound_balancer_waits_for_ready_endpoint (linkerd/linkerd2-proxy#2529)
* meshtls: Consolidate TLS ID verification (linkerd/linkerd2-proxy#2534)
* build(deps): bump DavidAnson/markdownlint-cli2-action (linkerd/linkerd2-proxy#2537)
* build(deps): bump tj-actions/changed-files from 40.1.1 to 40.2.0 (linkerd/linkerd2-proxy#2536)

Signed-off-by: Oliver Gould <ver@buoyant.io>

.proxy-version

@@ -1 +1 @@
-v2.213.0
+v2.214.0