Enable MicroVM Benchmarking

[Max Smythe (maxsmythe)]

Currently we are unable to easily automate the benchmarking of micro VMs.

This PR:

• Refactors the microVM setup scripts to allow discrete installation of uVM sanbox configs separate from counter demo
• Pipes a MicroVM container test config through the benchmarking system
• Updates default atelet daemonset to tolerate all kinds of sandboxClass taints

[Benjamin Elder (BenTheElder)]

generally lgtm, I think, one confusing nit

[Benjamin Elder (BenTheElder)]

🤖 nit 🟢 – This describes the mechanism the PR deliberately rejected. The config is named microvm, not microvm-default, and sandboxconfig-microvm.yaml.tmpl says it "is deliberately NOT marked default:true" so a dirty teardown cannot silently bind new pools — binding is by explicit sandboxConfigName, which is what the demo manifest and deploy.sh both do. "Resolves to microvm-default via sandboxClass=microvm" reads as default-by-class resolution, so a reader tracing why a WorkerPool picks this config would draw the wrong conclusion.

The stale name also appears at line 24 here and in three orchestrator.py docstrings (lines 288, 294, 441).