If excludeEnds is true, then cross sections must be strictly inside span (cross sections must be LOCATION_EQUAL_TOLERANCE inside span).
If excludeEnds is false, then cross sections on the end of the span will be included (within tolerance of LOCATION_EQUAL_TOLERANCE).
Uses StrictContains in the locationSpan to match. If there is a global cross section for this reachID, then an array of length 0 is returned.
public IList<ICrossSection> FindCrossSectionsForLocationSpan(
ILocationSpan locationSpan,
string topoID,
bool excludeEnds
)