add container_memory_rss system.slice

[qiliRedHat]

Type of change

• [ ] Refactor
• [x] New feature
• [ ] Bug fix
• [ ] Optimization
• [ ] Documentation Update

Description

In bug https://bugzilla.redhat.com/show_bug.cgi?id=1951877  Memory consumption keeps growing day by day for "/system.slice" (only on Master nodes) In 2 days graph it shoot to more than 1G of memory consumption from 500MB aprox.

This pr adds a new Metrics to monitor this metrics: "sum by(node) (container_memory_rss{id="/system.slice"})"

Related Tickets & Documents

https://issues.redhat.com/browse/OCPQE-17527

Checklist before requesting a review

• [x] I have performed a self-review of my code.
• [ ] If it is a core feature, I have added thorough tests.

Testing