Backport of Add emit_tags_as_labels to envoy bootstrap config when using Consul Telemetry Collector into release/1.16.x (#17901)

* backport of commit 94584cf540

* backport of commit aed6a00693

* backport of commit 2eb7a2a067

---------

Co-authored-by: josh <josh.timmons@hashicorp.com>

.changelog/17888.txt

@@ -0,0 +1,3 @@
+```release-note:improvement
+connect: Add capture group labels from Envoy cluster FQDNs to Envoy exported metric labels
+```

command/connect/envoy/bootstrap_config.go

@@ -847,7 +847,8 @@ func appendTelemetryCollectorConfig(args *BootstrapTplArgs, telemetryCollectorBi
 			"envoy_grpc": {
 			  "cluster_name": "consul_telemetry_collector_loopback"
 			}
-		  }
+		  },
+		  "emit_tags_as_labels": true
 		}
 	  }`
 

command/connect/envoy/bootstrap_config_test.go

@@ -539,7 +539,8 @@ const (
 		"envoy_grpc": {
 		  "cluster_name": "consul_telemetry_collector_loopback"
 		}
-	  }
+	  },
+	  "emit_tags_as_labels": true
 	}
   }`
 
@@ -638,7 +639,8 @@ func TestBootstrapConfig_ConfigureArgs(t *testing.T) {
 						"envoy_grpc": {
 						  "cluster_name": "consul_telemetry_collector_loopback"
 						}
-					  }
+					  },
+					  "emit_tags_as_labels": true
 					}
 				  }`,
 				StaticClustersJSON: `{

command/connect/envoy/testdata/telemetry-collector.golden

@@ -89,7 +89,8 @@
           "envoy_grpc": {
             "cluster_name": "consul_telemetry_collector_loopback"
           }
-        }
+        },
+        "emit_tags_as_labels": true
       }
     }
   ],