doc/cli: use latest release of src-cli
Created by: keegancsmith
go1.18 doesn't support go get to install a binary anymore. go install still doesn't work due to the replace directive. So I have over engineered something which instead fetches the latest release of src-cli and runs that.
One downside on CI is we go from using the local go module caching proxy to directly hitting GitHub. Maybe what we need instead is a way for asdf to install src-cli?
Test Plan: go generate ./doc/cli/references