Make eqv2 old to hydra converter work with old old configs :'(

[misko]

There is two layers of 'module' prefixed on old old eqv2 checkpoints. This works around them while also supporting newer versions. 🤞

[codecov]

Codecov Report

Attention: Patch coverage is 75.00000% with 3 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
...em/core/models/equiformer_v2/eqv2_to_eqv2_hydra.py	75.00%	3 Missing ⚠️

Files with missing lines	Coverage Δ
...em/core/models/equiformer_v2/eqv2_to_eqv2_hydra.py	92.72% <75.00%> (-5.24%)	⬇️