Right now, the deployment of the 'tip' version of the Go playground is broken due to the bump in Go bootstrap version (#54265).
https://cs.opensource.google/go/x/playground/+/master:Dockerfile;l=25;drc=6821b5629810defb1ea68149e090b5b86576d7ca

Since we know the latest released version of Go in the deploy stript (via the latestgo helper), we can also use that for bootstrapping the build.