fix(tdengine): make password a required field (rv5.0)
Fixes https://emqx.atlassian.net/browse/EMQX-9395
```
2023-03-29T09:59:02.655495+00:00 [warning] msg: start_resource_failed, mfa: emqx_resource_manager:start_resource/2, line: 524, id: <<"bridge:tdengine:jimmoen-test-trigger">>, reason: {error,function_clause,[{emqx_ee_connector_tdengine,on_start,[<<"bridge:tdengine:jimmoen-test-trigger:1076">>,#{database => <<"db">>,enable => true,pool_size => 8,resource_opts => #{auto_restart_interval => 60000,batch_size => 1,batch_time => 0,health_check_interval => 15000,max_queue_bytes => 104857600,query_mode => sync,request_timeout => 15000,start_after_created => true,start_timeout => 5000,worker_pool_size => 16},server => "127.0.0.1",sql => <<"insert into mqtt.t_mqtt_msg(ts, msgid, mqtt_topic, qos, payload, arrived) values (${ts}, ${id}, ${topic}, ${qos}, ${payload}, ${timestamp})">>,username => <<"root">>}],[{file,"emqx_ee_connector_tdengine.erl"},{line,76}]},{emqx_resource,call_start,3,[{file,"emqx_resource.erl"},{line,359}]},{emqx_resource_manager,start_resource,2,[{file,"emqx_resource_manager.erl"},{line,513}]},{gen_statem,loop_state_callback,11,[{file,"gen_statem.erl"},{line,1205}]},{proc_lib,init_p_do_apply,3,[{file,"proc_lib.erl"},{line,226}]}]}
```
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