[Epic] Update the 'Administration' section

Related doc issue: https://github.com/tarantool/doc/issues/3177

Product: Tarantool
Since: 3.0
Audience/target: admins
Root document: https://www.tarantool.io/en/doc/latest/book/admin/
SME:

There are a set of changes in the 3.0 version of Tarantool that might affect docs in the Administration section:

Tarantool uses a new approach for developing cluster applications (epic https://github.com/tarantool/doc/issues/3920). This is not documented yet.
To package the resulting application before deployment, the tt pack command can be used.
The recommended way of deploying and administering cluster application for Enterprise customers is Ansible Tarantool Enterprise.
TCM also allows performing many administrative tasks (switching leaders, monitoring, etc.)

Taking into account all of these, it is necessary to revise the Administration section. Ideas for possible structure: https://docs.google.com/document/d/1F_looF24B6Ai0BL2JNWgVdbLcDcTPJhzVcVOuogDymA/edit?usp=sharing

Note that there are different kind of "layers" of administering a cluster:

Tarantool database specifics: connection types, access control, memory usage, configuration errors, etc.
Tooling used for administration: system tools (for example, systemd), tt CLI, ATE, TCM.

Description