Remove or move to Alertmanager:
- k8s etcd node health
- k8s worker health
These can be replaced with T357977: [toolforge.infra] create fullstack tests:
- dumps access
- nfs read/write
- redis set/get
- ldap
- dns
- toolsdb read/write
To be removed:
T358333: Remove toolschecker grid engine checks
- grid cron job mtime
- grid long-running
- grid start a job