Clarify that the centralized configuration cannot contain the 'config.etcd' and 'config.storage' sections

[andreyaksenov]

Product: Tarantool
Since: 3.0
Root document:

• https://www.tarantool.io/en/doc/latest/reference/configuration/configuration_reference/#config-etcd
• https://www.tarantool.io/en/doc/latest/reference/configuration/configuration_reference/#config-storage

SME: @ totktonada

[Totktonada]

The title is a bit misleading. It is OK to have config.context in the centralized configuration storage. However, that's true that config.etcd and config.storage in the centrilized storage have no much sense.

See also https://github.com/tarantool/tarantool-ee/issues/644, where the actual check was implemented.

[andreyaksenov]

The title is a bit misleading. It is OK to have config.context in the centralized configuration storage.

Totally agree. Created the issue before understanding the full context. Will fix.