Configuration adds version attribute support

[nihongye]

It is hoped that in addition to content and description, the configuration will add version attributes that users can name themselves, which can bring several benefits including but not limited to traceability, readability and understandability, standardization, communication efficiency, collaborative work, deployment and return. roll, documentation and support.

[shiyiyue1102]

it may be considered to nacos 3.0, to add a comment while publish config interface

[985492783]

it may be considered to nacos 3.0, to add a comment while publish config interface

i think table<config_info> can use c_desc or add a new json field content to extend all future features

[985492783]

it may be considered to nacos 3.0, to add a comment while publish config interface

i think table<config_info> can use c_desc or add a new json field content to extend all future features

类似naming的元数据，这样服务测也可以根据config的元数据做一些插件化处理例如审计，或者用户想要的版本号等等，不能一直添加字段让表膨胀