[Exp PyROOT] Temporarily disable tests that use RooDataHist::plotOn

These tests will work again once this PR is merged:
https://github.com/root-project/root/pull/3640

The feature implemented by the PR consists in automatically adding
using declarations of methods from a base class to the derived
class. After the PR is merged, the feature will be provided by
the bindings.

bindings/pyroot_experimental/PyROOT/test/CMakeLists.txt

@@ -86,7 +86,7 @@ if(roofit)
   ROOT_ADD_PYUNITTEST(pyroot_pyz_rooabscollection_len rooabscollection_len.py)
 
   # RooDataHist pythonisations
-  ROOT_ADD_PYUNITTEST(pyroot_pyz_roodatahist_ploton roodatahist_ploton.py)
+  ROOT_ADD_PYUNITTEST(pyroot_pyz_roodatahist_ploton roodatahist_ploton.py ${PYTESTS_WILLFAIL})
 endif()
 
 # std::string_view backport in CPyCppyy

tutorials/CMakeLists.txt

@@ -459,6 +459,9 @@ if(ROOT_python_FOUND)
                  tutorial-pyroot-tornado-py
                  tutorial-pyroot-tree-py
                  tutorial-roofit-rf106_plotdecoration-py
+                 tutorial-roofit-rf315_projectpdf-py
+                 tutorial-roofit-rf402_datahandling-py
+                 tutorial-roofit-rf610_visualerror-py
                  tutorial-vecops-vo004_SortAndSelect-py
                  tutorial-vecops-vo005_Combinations-py)