extract env vars to single-declaration; remove sleep and replace with awaitLatestBuild script; move timing to AM,

this is updated with each import cycle and committed; large number of build minutes and not required here

in lieu of incorporation into CI/CD workflow; keeps triggerBuild.ts script

Repeat calls could produce the same build ID. `import "dotenv/config"` not needed when called from an action

Requires getting process.env.BUILD_ID from previous script in workflow (triggerBuild.ts)