Allow disabling access to the DB and the Teams API.

Command-line options --nodatabaseaccess and --noteamsapi disable all
teams api interaction and access to the Postgres database. This is
useful for debugging purposes when the operator runs out of cluster
(with --outofcluster flag).

The same effect can be achieved by setting enable_db_access and/or
enable_teams_api to false.

pkg/util/config/config.go

@@ -52,6 +52,8 @@ type Config struct {
 	WALES3Bucket       string `name:"wal_s3_bucket"`
 	KubeIAMRole        string `name:"kube_iam_role"`
 	DebugLogging       bool   `name:"debug_logging" default:"false"`
+	EnableDBAccess	   bool   `name:"enable_db_access" default:"true"`
+	EnableTeamsAPI     bool   `name:"enable_teams_api" default:"true"`
 	DNSNameFormat      string `name:"dns_name_format" default:"%s.%s.%s"`
 	Workers            uint32 `name:"workers" default:"4"`
 }