[Config] Update metrics configuration to using a new config

[andreyaksenov]

Related doc issue: #4256
Demo: https://docs.google.com/presentation/d/1nGGOLzVik4vGppN9jpbLXsXCMl-M4j9--ZC_nEkyHb0/edit#slide=id.g276945798c6_0_38 (page 25-27)

Product: Tarantool
Since: 3.0
Root document: https://www.tarantool.io/en/doc/latest/book/monitoring/api_reference/#lua-function.metrics.cfg
SME: @ Totktonada

Details

Schema: https://github.com/tarantool/tarantool/blob/7db4de75f8bd975066635f942ee49f33a2209353/src/box/lua/config/instance_config.lua#L1855

Example: https://github.com/ktorio/ktor-documentation/tree/2.3.12/codeSnippets/snippets/micrometer-metrics