allow disabling pybind11 tests with 'runtest = False'

[mboisson]

While rebuilding a bunch of modules for python/3.11, pybind11 fails. This allows me to disable the tests.

The tests fail with

20562 ================================================================================================================================================================================= FAILURES                                                                                                                                                                                  =================================================================================================================================================================================
20563 _____________________________________________________________________________________________________________________________________________________________________________ test_properties                                                                                                                                                                               ______________________________________________________________________________________________________________________________________________________________________________
20564
20565     def test_properties():
20566         instance = m.TestProperties()
20567
20568         assert instance.def_readonly == 1
20569         with pytest.raises(AttributeError):
20570             instance.def_readonly = 2
20571
20572         instance.def_readwrite = 2
20573         assert instance.def_readwrite == 2
20574
20575         assert instance.def_property_readonly == 2
20576         with pytest.raises(AttributeError):
20577             instance.def_property_readonly = 3
20578
20579         instance.def_property = 3
20580         assert instance.def_property == 3
20581
20582         with pytest.raises(AttributeError) as excinfo:
20583             dummy = instance.def_property_writeonly  # unused var
20584 >       assert "unreadable attribute" in str(excinfo.value)
20585 E       assert 'unreadable attribute' in "property of 'TestProperties' object has no getter"
20586 E        +  where "property of 'TestProperties' object has no getter" = str(AttributeError("property of 'TestProperties' object has no getter"))
20587 E        +    where AttributeError("property of 'TestProperties' object has no getter") = <ExceptionInfo AttributeError("property of 'TestProperties' object has no getter") tblen=1>.value
20588
20589 ../../pybind11/pybind11-2.9.2/tests/test_methods_and_attributes.py:106: AssertionError
20590 __________________________________________________________________________________________________________________________________________________________________________ test_static_properties                                                                                                                                                                           __________________________________________________________________________________________________________________________________________________________________________
20591
20592     def test_static_properties():
20593         assert m.TestProperties.def_readonly_static == 1
20594         with pytest.raises(AttributeError) as excinfo:
20595             m.TestProperties.def_readonly_static = 2
20596 >       assert "can't set attribute" in str(excinfo.value)
20597 E       assert "can't set attribute" in "property of 'pybind11_type' object has no setter"
20598 E        +  where "property of 'pybind11_type' object has no setter" = str(AttributeError("property of 'pybind11_type' object has no setter"))
20599 E        +    where AttributeError("property of 'pybind11_type' object has no setter") = <ExceptionInfo AttributeError("property of 'pybind11_type' object has no setter") tblen=1>.value
20600
20601 ../../pybind11/pybind11-2.9.2/tests/test_methods_and_attributes.py:124: AssertionError
20602 ========================================================================================================================================================================= short test summary info                                                                                                                                                                           ==========================================================================================================================================================================

[jfgrimm]

lgtm

[jfgrimm]

Test report by @jfgrimm

Overview of tested easyconfigs (in order)

• SUCCESS pybind11-2.9.2-GCCcore-11.3.0.eb
• SUCCESS pybind11-2.7.1-GCCcore-11.2.0.eb
• SUCCESS pybind11-2.6.2-GCCcore-10.3.0.eb
• SUCCESS pybind11-2.6.0-GCCcore-10.2.0.eb

Build succeeded for 4 out of 4 (4 easyconfigs in total)
himem05.pri.viking.alces.network - Linux CentOS Linux 7.9.2009, x86_64, Intel(R) Xeon(R) Gold 6230 CPU @ 2.10GHz (cascadelake), Python 3.6.8
See https://gist.github.com/c3edbbfa40cf3fbcc8ebd0de60dcb862 for a full test report.

[jfgrimm]

Going in, thanks @mboisson!