[$] An update on continuous testing of BPF kernel patches

Ihor Solodrai has been working on the BPF subsystem's continuous-integration(CI) testing for the last six months. At the 2025 Linux Storage, Filesystem,Memory-Management, and BPF Summit, he remotely sharedan update on his work, and solicited feedback on how the tests could be furtherimproved. Much of the work he's done has been specific to the BPF subsystem, butsome is more generic and could potentially be of use to other subsystems. Healso shared some general lessons learned from working on the BPF CI tests.