bazel-slave: Build all targets in cache warm up step

Since I41c6978c7a8 CI was changed to build the whole world during the
build. However, the cache warm up step wasn't adjusted.

Since I9dbda32a8c8 PolyGerrit dev server was bazelified, and for that
Go-Lang runtime is downloaded during the build. Given that cache warm
up step wasn't extended, the Go-Lang runtime is downloaded during the
CI build instead to be consumed from Bazel's repository cache, that is
activated in Gerrit's %workspace%/.bazelrc file:

  build --repository_cache=~/.gerritcodereview/bazel-cache/repository

Bug: Issue 9977
Change-Id: Id3a82bc006827292fa21be31a72dff0d90d74228
1 file changed
tree: 48823fd69892fdfe6d2b84808123f947af144196
  1. jenkins/
  2. jenkins-docker/
  3. worker/
  4. .gitignore