HPCC-12599 Option in Roxie to bind queries to cores

Set coresPerQuery in RoxieTopology.xml or bindCores in workunit
debug values ir in query XML to indicate that execution of this
query should be bould to at most N cores out of the ones that
the Roxie process itself is bould to.

Signed-off-by: Richard Chapman <rchapman@hpccsystems.com>
So numCores is a maximum number of cpus to use and not a bitmask of which cpus. I initially thought it was a bitmask so I could specify cpus 0,5 for example by setting numCores to 0x21