This change eliminates our dependencies on the SDK repo. Now that
SDKs are comprised solely of pulumi/pulumi artifacts, a separate repo
isn't required. This allows us to simplify some of the distribution.
The install.sh script is modified slightly, to permit overriding the
default install location using $PULUMI_INSTALL_PATH.
The windows build was still on the old plan from way back when where
we had binaries littered in the build tree and you had to add parts of
your build-tree to the `%PATH%` for the integration tests to work.
This cleans that up and moves all of our scripts that invoke
javascript to be on the same plan. They invoke our specially named
node with a relative path to the JS code we want to run.
- `go build` handles appending .exe to the built binary, so we need not do
it ourselves. In fact, when we did we generated a binary called
`pulumi.exe.exe` which is not what we wanted.
- Remove the development versions of the langhost and dynamic provider,
from the `<root>/node_modules/pulumi` folder. The `dist` version gets
copied into bin.
- Add the dummy_argument workaround to the dist version of the langhost.
