MAINT: reintroduce a OInfo get method for backward compatibility. (#14033)...
MAINT: reintroduce a OInfo get method for backward compatibility. (#14033)
Reintroduce a OInfo get method for backward compatibility.
OInfo was converted to a dataclass from dict in commit 0fef298ad70ff72,
but some external code is still be using it.
This commit reintroduces the method, but deprecates it.
Fixes
https://github.com/h5py/h5py/issues/2253