By using npm ci, we can make sure the versions of the helper
libraries (e.g. Karma, Jasmine) we are testing with locally
is the same as the versions we are using in the continuous
integration system.
The copying is needed because our docker recipe forces us
to run as not root, and this was causing some issues. As a
result, I changed the canvaskit test/perf to not re-use the
same file as pathkit does so copying was easier and the
dependencies between the two modules is broken.
Bug: skia:11077
Change-Id: Ib05890d666d3507d4f724a4ae298484629c7932a
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/343503
Reviewed-by: Kevin Lubick <kjlubick@google.com>