Move prometheus configuration to ooni/devops

[hellais]

In this PR we move the prometheus configuration from ooni/sysadmin into ooni/devops.

As part of this work I also deleted pieces of the original configuration that were effectively dead code.

Going forward we should only deploy changes to the monitoring configuration from ooni/devops and we should update the developer docs where relevant.

As an interim safety running the playbook for monitoring will display a warning message and not run in ooni/sysadmin: ooni/sysadmin#519.

[github-actions]

Ansible Run Output 🤖

Ansible Playbook Recap 🔍

Ansible playbook output 📖success

Show Execution

$ ansible-playbook playbook.yml --check --diff -i ../tf/modules/ansible_inventory/inventories/inventory-dev.ini
[WARNING]: provided hosts list is empty, only localhost is available. Note that
the implicit localhost does not match 'all'
[WARNING]: Could not match supplied host pattern, ignoring: clickhouse_servers
[WARNING]: Could not match supplied host pattern, ignoring: monitoring.ooni.org

PLAY [ClickHouse servers] ******************************************************
skipping: no hosts matched

PLAY [Update monitoring config] ************************************************
skipping: no hosts matched

PLAY RECAP *********************************************************************

Pusher	@hellais
Action	pull_request
Working Directory
Workflow	.github/workflows/check_ansible.yml
Last updated	Tue, 19 Mar 2024 16:08:50 GMT

[DecFox]

LGTM!