We retain a few tests on the RunBuild plan, with `typescript` set to
false in the runtime options, but for the general case, we remove the
build steps and custom entry points for our programs.
In order to begin publishing our core SDK package to NPM, we will
need it to be underneath the @pulumi scope so that it may remain
private. Eventually, we can alias pulumi back to it.
This is part of pulumi/pulumi#915.
