Move build scripts and setup local dev

[devindford]

What does this PR do? What is the motivation?

• Removes build scripts from repo
• Keeps only the integration and pull config files locally
• updates .gitignore to match the new patterns
• adds make commands for sourcing local build scripts
  • setup-build-scripts
  • clean-build-scirpts
  • restore-config
  • backup-config
  • start-preserve-build
• updates make config example with the required env vars needed to pull build scripts locally
• updates make start to run setup-build-scripts
• updates clean-all to include clean-build-scripts

start-preserve-build is the old start command, this is intended for testing build script changes locally prior to opening a PR in the repo that contains them

Merge instructions

Merge queue is enabled in this repo. To have it automatically merged after it receives the required reviews, create the PR (from a branch that follows the <yourname>/description naming convention) and then add the following PR comment:

/merge

Additional notes