* build: turn GitHub Actions on by default for push and pull_request
* build: try env var build-image-sha
* build: use ternery for input vs default
* build: pain
* build: modify setup to cascade build-image-sha
* build: move outputs into setup step
* build: add SAS key generation on re-run
* build: only build on push, not pull_request
* build: only build on push for main & release branches, build on PR for everything else
* build: rebase with main, handle asan build
* build: add exit 1, sha value
