[STG-1232] Speed up PR Github Actions checks, add code coverage, fix e2e bb tests running not running in bb mode, remove tsup, generate unified re-used ESM and CJS builds with sourcemaps and types, switch CI to new Evals CLI

[STG-1232] Speed up PR Github Actions checks, add code coverage, fix e2e bb tests running not running in bb mode, remove tsup, generate unified re-used ESM and CJS builds with sourcemaps and types, switch CI to new Evals CLI #916