0024968: Impove BRepMesh_Classifier to cope with intersection of huge number of wires

BRepMesh_Classifier: Two-pass approach for intersection check with possibility to run it in parallel mode.
First pass - bounding boxes of segments are checked for overlapping;
Second pass - intersection point is calculated in case if overlapping is detected.

Make NCollection_UBTree::ChangeLastNode() exported due to compilation error on Linux platform.
Reason: method does not depend on template parameters, so it should be available.

Revert previous change and try to use another trick for Linux

Fix compilation warning on MacOS: remove redundant constant
Fix regressions: do not consider insignificant loops in case of self intersections on the same wire.
More sugar solution for compilation errors on NCollection_EBTree on Linux

Test cases for issue CR24968

src/BRepMesh/FILES

@@ -2,7 +2,13 @@ BRepMesh_PluginEntryType.hxx
 BRepMesh_PluginMacro.hxx
 BRepMesh_Triangle.hxx
 BRepMesh_Triangle.cxx
+BRepMesh_Classifier.hxx
+BRepMesh_Classifier.cxx
 BRepMesh_ClassifierPtr.hxx
+BRepMesh_WireInterferenceChecker.hxx
+BRepMesh_WireInterferenceChecker.cxx
+BRepMesh_WireChecker.hxx
+BRepMesh_WireChecker.cxx
 BRepMesh_CellFilter.hxx
 BRepMesh_Delaun.hxx
 BRepMesh_Delaun.cxx