Additional SuperIlc fixes for running composite R2R images (#32665)

Additional SuperIlc fixes for running composite R2R images (#32665)

As an expedite way to run "non-shared" composite R2R images
(including the frameworK) I have added support to SuperIlc to
copy corerun, coreclr, clrjit and mscorrc next to the compiled
composite executable and supplying that as the CORE_ROOT
folder; otherwise corerun in the normal Tests/Core_Root
automatically grabs the framework next to it, not the composite
rewritten versions.

Thanks

Tomas