- build-extra-tests composite-action comment changed to Builds extra test required for FireSim tests
- removed unneeded inputs tools-version and group-key from run-tests composite action
- Added better comment to toolchain-build composite action
- Change CI_MAKE_NPROC back to 8 in defaults.sh
- Moved all the duplicated enviroment setting stuff in workflow file to the top
- BUILDSERVER, BUILDUSER, CI_DIR, SERVER, and JVM_OPTS
- Romoved all the not needed passed parameters in the calls to run-script
- A bit of cleanup to .github/README.md
- added link to SO `if` hack
- cleaned up comments on CI_DIR
- removed bad empty final bullet line
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