Fix benchmarks and refactor container-stats

[robbycochran]

Description

This PR removes the container-stats image and uses the docker api to poll CPU and memory utilization for the collector container. I suspect that container-stats stopped working on rhel VMs when we stopped installing docker.

In the process of testing this PR I've reset the existing baseline in the GCP bucket.

Checklist

• [x] Investigated and inspected CI test results
• [ ] Updated documentation accordingly

Automated testing

• [x] Added integration tests

Testing Performed

[github-actions[bot]]

VM	Method	Baseline CPU median (%)	Test CPU median (%)	CPU P-value
rhel.rhel-8	core-bpf	4.61	4.77	:green_circle:
rhel.rhel-9	core-bpf	5.51	5.4	:green_circle:
ubuntu-os.ubuntu-2004-lts	core-bpf	46.65	43.18	:green_circle:
ubuntu-os.ubuntu-2204-lts	core-bpf	45.54	33.22	:red_circle:

---

VM	Method	Baseline Memory median (MiB)	Test Memory median (MiB)	Memory P-value
rhel.rhel-8	core-bpf	23.05	21.14	:green_circle:
rhel.rhel-9	core-bpf	23.12	22.41	:green_circle:
ubuntu-os.ubuntu-2004-lts	core-bpf	46.01	45.94	:green_circle:
ubuntu-os.ubuntu-2204-lts	core-bpf	48.64	48.59	:green_circle: