fix(connector_schema): remove `query_mode` from `resource_opts`

The connector query mode is inferred during its creation, and later it must be overridden
by an action, anyway.

apps/emqx_bridge/test/emqx_bridge_v2_tests.erl

@@ -69,7 +69,6 @@ connector_resource_opts_test() ->
     %% These are used by `emqx_resource_manager' itself to manage the resource lifecycle.
     MinimumROFields = [
         health_check_interval,
-        query_mode,
         start_after_created,
         start_timeout
     ],

apps/emqx_connector/src/schema/emqx_connector_schema.erl

@@ -533,7 +533,6 @@ resource_opts_ref(Module, RefName) ->
 common_resource_opts_subfields() ->
     [
         health_check_interval,
-        query_mode,
         start_after_created,
         start_timeout
     ].