Machine metrics for Tuist Runners CI jobs

Tuist Runners CI jobs now surface runner machine metrics on the job detail page. A new Metrics tab shows a five‑chart grid covering CPU, Memory, Network, CPU I/O Wait, and Storage for the runner that executed the job, and a compact CPU/Memory/Network row is added to the CI Details card on the Overview for an at‑a‑glance read. Hovering a step shades that step’s time window across every chart, so resource usage can be correlated with the step that produced it. Charts use uniform percent axes and straight point‑to‑point segments so real spikes and dips are visible, and jobs without samples yet show an empty state. The runners-controller now includes a leader‑only collector that samples busy runner pods on a configurable interval and posts the data back to Tuist for storage.