re-enable metrics check and disable TCP check on libp2p port

Mostly likely the fact we dropped docker-proxy/userland-proxy from our
configuration has revealed the fact that currently Nimbus limits the
number of connections it accepts, and once that limit is reached it just
stops accepting new TCP connections.

For more details see:
https://github.com/status-im/infra-nimbus/issues/35#issuecomment-778503016

Signed-off-by: Jakub Sokołowski <jakub@status.im>

tasks/consul.yml

@@ -9,10 +9,10 @@
         port: '{{ beacon_node_listening_port }}'
         address: '{{ beacon_node_public_address }}'
         tags: ['{{ env }}.{{ stage }}', 'beacon', 'nimbus']
-        checks:
-          - name: '{{ beacon_node_consul_service_name }}-health'
-            type: 'tcp'
-            tcp: 'localhost:{{ beacon_node_listening_port }}'
+        #checks:
+        #  - name: '{{ beacon_node_consul_service_name }}-health'
+        #    type: 'tcp'
+        #    tcp: 'localhost:{{ beacon_node_listening_port }}'
 
       - id: '{{ beacon_node_cont_name }}-metrics'
         name: '{{ beacon_node_consul_metrics_service_name }}'
@@ -21,7 +21,7 @@
         tags: ['{{ env }}.{{ stage }}', 'beacon', 'nimbus', 'metrics']
         meta:
           container: '{{ beacon_node_cont_name }}'
-        #checks:
-        #  - name: '{{ beacon_node_consul_metrics_service_name }}-health'
-        #    type: 'http'
-        #    http: 'http://localhost:{{ beacon_node_metrics_port }}/metrics'
+        checks:
+          - name: '{{ beacon_node_consul_metrics_service_name }}-health'
+            type: 'http'
+            http: 'http://localhost:{{ beacon_node_metrics_port }}/metrics'