Cmake cleanup

[pvelesko]

• Update README

• Move some cmake options to config.hh.in

• Rename CHIPSPVConfig.hh.in to chipStarConfig.hh.in

• Remove old queueSync code

• [x] Remove old check.py

• [x] Runtime check for disabling ICL if iGPU is detected

• [x] checkv2 error code

[pvelesko]

Some of the commit messages are useless and should be improved (if you rebase), otherwise looks quite good.

Since we do squash merge, there will be custom, single, commit going into main.

[pjaaskel]

The new check.py doesn't seem to output the test progress. Does it buffer it? It would be useful to see the tests running.

[edit: pocl target is still needed in check.py due to different failure lists]