chore(proxy): Add annotations to downward API (#14580)

Some annotations are used in the proxy for trace labels, this adds them into the downward API for consumption by the proxy.

Signed-off-by: Scott Fleener <[email protected]>

Author: sfleen

charts/partials/templates/_proxy.tpl

@@ -151,6 +151,8 @@ env:
 {{ if .Values.proxy.tracing | default (dict) | dig "enabled" false -}}
 - name: LINKERD2_PROXY_TRACE_ATTRIBUTES_PATH
   value: /var/run/linkerd/podinfo/labels
+- name: LINKERD2_PROXY_TRACE_ANNOTATIONS_PATH
+  value: /var/run/linkerd/podinfo/annotations
 - name: LINKERD2_PROXY_TRACE_PROTOCOL
   value: {{ default "opentelemetry" .Values.proxy.tracing.protocol }}
 - name: LINKERD2_PROXY_TRACE_SERVICE_NAME

charts/partials/templates/_volumes.tpl

@@ -11,6 +11,9 @@ downwardAPI:
     - path: labels
       fieldRef:
         fieldPath: metadata.labels
+    - path: annotations
+      fieldRef:
+        fieldPath: metadata.annotations
 {{- end -}}
 
 {{ define "partials.proxyInit.volumes.xtables" -}}