[Config] Update 'WAL extension configuration' to using a new config

[andreyaksenov]

Product: Tarantool
Since: 3.0
Root document: https://www.tarantool.io/en/enterprise_doc/wal_extensions/#configuration
SME: @ Totktonada

Details

See also: https://docs.google.com/spreadsheets/d/1_yEK9N_hBVWIga9mOk7zZzA6Zd3mAq7e5KZsnrbgj30/edit#gid=0