AttributeError: module 'pkgutil' has no attribute 'get_loader' on Python 3.14

[aijanai]

pkgutil.get_loader was deprecated in Python 3.12 and completely removed in Python 3.14.

maestrowf depends on pkgutil and this caps his usability to < 3.14.

(btk_venv) (maestro-3-14-broken) amassidda@8be022c-lcelt:~/workspace/benchmarking_toolkit$ maestro run -fg -y --hashws -s 60 btk_config_rendered_spec.yml 
Traceback (most recent call last):
  File "/home/amassidda/workspace/benchmarking_toolkit/btk_venv/bin/maestro", line 4, in <module>
    from maestrowf.maestro import main
  File "/home/amassidda/workspace/benchmarking_toolkit/btk_venv/lib/python3.14/site-packages/maestrowf/maestro.py", line 43, in <module>
    from maestrowf.conductor import Conductor
  File "/home/amassidda/workspace/benchmarking_toolkit/btk_venv/lib/python3.14/site-packages/maestrowf/conductor.py", line 44, in <module>
    from maestrowf.datastructures.core import Study
  File "/home/amassidda/workspace/benchmarking_toolkit/btk_venv/lib/python3.14/site-packages/maestrowf/datastructures/core/__init__.py", line 48, in <module>
    from maestrowf.datastructures.core.executiongraph import ExecutionGraph
  File "/home/amassidda/workspace/benchmarking_toolkit/btk_venv/lib/python3.14/site-packages/maestrowf/datastructures/core/executiongraph.py", line 18, in <module>
    from maestrowf.interfaces import ScriptAdapterFactory
  File "/home/amassidda/workspace/benchmarking_toolkit/btk_venv/lib/python3.14/site-packages/maestrowf/interfaces/__init__.py", line 68, in <module>
    class ScriptAdapterFactory(object):
    ...<21 lines>...
            return cls.factories.keys()
  File "/home/amassidda/workspace/benchmarking_toolkit/btk_venv/lib/python3.14/site-packages/maestrowf/interfaces/__init__.py", line 74, in ScriptAdapterFactory
    adapter.key: adapter for adapter in iter_adapters()
                                        ~~~~~~~~~~~~~^^
  File "/home/amassidda/workspace/benchmarking_toolkit/btk_venv/lib/python3.14/site-packages/maestrowf/interfaces/__init__.py", line 50, in iter_adapters
    loader = pkgutil.get_loader('maestrowf.interfaces.script')
             ^^^^^^^^^^^^^^^^^^
AttributeError: module 'pkgutil' has no attribute 'get_loader'

As it is right now we should pin the version to < 3.14