Deactivate scrape metrics on the static prometheus

So it's done within the dynamic infra cluster. That way, we'll be able to design alertmanager alerts.

Another commit is done [1] to activate the scraping within the prod & staging clusters.

[1] swh/infra/ci-cd/swh-charts!340 (merged)

octo-diff scheduler0|saatchi

*** Running octocatalog-diff on host scheduler0.internal.staging.swh.network
I, [2024-02-08T11:56:21.810525 #1743890]  INFO -- : Catalogs compiled for scheduler0.internal.staging.swh.network
I, [2024-02-08T11:56:22.038371 #1743890]  INFO -- : Diffs computed for scheduler0.internal.staging.swh.network
diff origin/production/scheduler0.internal.staging.swh.network current/scheduler0.internal.staging.swh.network
*******************************************
- Profile::Prometheus::Export_scrape_config[rabbitmq]
*******************************************
*** End octocatalog-diff on scheduler0.internal.staging.swh.network

Refs. swh/infra/sysadm-environment#5213 (closed)