docs/sysadm/service-urls: Adapt according to latest migrations

Most were outdated since the migration to the dynamic infrastructure. We were missing icinga alerts which got added along the way too.

This is the conclusion of the convergence for the task referenced.

Refs. swh/infra/sysadm-environment#5205 (closed)

mentioned in issue swh/infra/sysadm-environment#5205 (closed)

Jenkins job DDOC/builds #557 succeeded .
See Console Output and Coverage Report for more details.

merged