* add build backend for x86_64
* remove unnecessary build steps
* install backend dependency
* build and run backend unittest
* fix cache key
* buildx is required, qemu is not.
* Add missing steps from Makefile
* fix build_command var is unused
* select more common test env
* update pipeline names and docs
* use variable for node version
* use correct artifact name
* update pipeline references
* skip unittest that needs ca-cert installed
* correct pipeline name
* use nextest pre-built binary; add term color
* fix cache permissions warning
* update documentation
