trooper-o-matic: List patch links on CQ graph selection
trooper-o-matic: List patch links on CQ graph selection

This change updates trooper-o-matic's /cq/* to list the worst performing
patches at a given time interval when the graph is selected.
This helps with debugging poor CQ performance.

BUG=416417

Review URL: https://codereview.chromium.org/619523004

nicko96/Chrome-Infra,nicko96/Chrome-Infra,nicko96/Chrome-Infra,nicko96/Chrome-Infra,nicko96/Chrome-Infra