fixing an issue with 'legacy' grid2op and storage unit #514

Job	Run time
Build linux cp37 wheel on manylinux_2_28_x86_64	3m 38s
Build darwin cp37 wheel on x86_64	5m 34s
Build linux cp38 wheel on manylinux_2_28_x86_64	3m 28s
Build darwin cp38 wheel on x86_64	4m 27s
Build windows cp37 wheel for x64	5m 45s
Build linux cp39 wheel on manylinux_2_28_x86_64	3m 36s
Build windows cp38 wheel for x64	5m 12s
Build darwin cp39 wheel on x86_64	3m 38s
Build macos-14 cp38 wheel with cibuildwheel	6m 0s
Build linux cp310 wheel on manylinux_2_28_x86_64	3m 39s
Build windows cp39 wheel for x64	5m 14s
Build macos-14 cp39 wheel with cibuildwheel	2m 5s
Build darwin cp310 wheel on x86_64	6m 4s
Build linux cp311 wheel on manylinux_2_28_x86_64	3m 32s
Build windows cp310 wheel for x64	6m 46s
Build windows-2019 cp39 wheel with cibuildwheel	5m 49s
Build darwin cp310 wheel on arm64	4m 4s
Build linux cp312 wheel on manylinux_2_28_x86_64	3m 41s
Build windows cp311 wheel for x64	6m 29s
Build windows-2019 cp310 wheel with cibuildwheel	7m 4s
Build darwin cp311 wheel on x86_64	5m 46s
Build linux cp313 wheel on manylinux_2_28_x86_64	3m 3s
Build windows cp312 wheel for x64	6m 16s
Build windows-2019 cp311 wheel with cibuildwheel	7m 52s
Build darwin cp311 wheel on arm64	2m 35s
Build windows cp313 wheel for x64	6m 16s
Build windows-2019 cp312 wheel with cibuildwheel	6m 36s
Build darwin cp312 wheel on x86_64	5m 31s
Build windows-2019 cp313 wheel with cibuildwheel	4m 46s
Build darwin cp312 wheel on arm64	3m 19s
Build darwin cp313 wheel on x86_64	4m 44s
Build darwin cp313 wheel on arm64	2m 54s
Package wheels	5s
	2h 35m 28s

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