docs/ci: document how to run traces locally
Basic documentation how to work with traces locally. More details can be found in the links to the Apitrace or Piglit suite.
How it does look: https://mesa.pages.freedesktop.org/-/mesa/-/jobs/25144429/artifacts/public/ci/local-traces.html
Reference: https://paste.sr.ht/~okias/c2101a3f561e7c7d01897054098b1b69d5e85fcc
Edited by David Heidelberg