[#83818422] Separate radiance/energyplus packaging

-Splits PACKAGE_ENERGYPLUS_AND_RADIANCE into PACKAGE_ENERGYPLUS and
PACKAGE_RADIANCE.
-Passes new options down to OSCore
-Cleans up some path walking code to deal with recent-ish changes to
installation folder layout
It is not for testing from a build tree - I explicitly exclude the build tree from searches for tools because of other reasons.

Possible answers are:

1) I didn't know there was a better way
2) I tried the way you are suggesting and ran into some other issue?
3) I found something that worked and didn't investigate further since it was a task that only affecting one user in special cases.