proposal: Remove args support for databend

[Xuanwo]

Databend has so many configs that it's nearly impossible for users to config them by args.

How about removing them all (except --config)?

After this change, users can only config by databend by config files and env.

[everpcpc]

Some arguments like listen ip address can only be determined at runtime and vary in instance, they need to be able to set by argument.

[Xuanwo]

How about removing part of args support like storage?

[ZhiHanZ]

I think it is an non-trivial breaking change, as we could see that many of our CI scripts are using arguments, maybe we should take several weeks for migration, besides in databend-meta there do not have much configurations in config file, we could rely on arguments for much readable configurations.