Make metadata collection setable with flag

There might be a performance impect of updating the metadata store on
bulk operations. Hence this flag which is disabling the collection by
default. If the queries to obtain the information are called with this
flag disabled, the database will throw an exception.

tests/e2e/configuration/default_config.py

@@ -115,6 +115,11 @@ startup_config_dict = {
         "false",
         "Controls whether the index creation can be done in a multithreaded fashion.",
     ),
+    "storage_enable_schema_metadata": (
+        "false",
+        "false",
+        "Controls whether metadata should be collected about the resident labels and edge types.",
+    ),
     "password_encryption_algorithm": ("bcrypt", "bcrypt", "The password encryption algorithm used for authentication."),
     "pulsar_service_url": ("", "", "Default URL used while connecting to Pulsar brokers."),
     "query_execution_timeout_sec": (