CI: Optimize pipeline for total build time usage

Instead allowing building of everything in parallel, build toolchain recipes
first, so that when openharmony-standard recipe has to be build, it is only
build once for each target machine.

Building both basic toolchain and bundle recipes in one job, and building target
image and sdk tools in one recipe, also cuts down in total build time burned on
CI runners.

Signed-off-by: Esben Haabendal <esben@geanix.com>