HPCC-12183 component cleanup with HPCC-12093 dependencies

Signed-off-by: Michael Gardner <Michael.Gardner@lexisnexis.com>
We no longer have *non* LCR - so you can get rid of the notion that there is both, from here and in run_thor.
So in fact there is no point in $prog any more, i.e. just use 'thorslave_lcr' in start_slaves