Remove filtering of q_cells and identity in ema calculation

[shmh40]

Removed condition to skip parameters containing 'identity' or 'q_cells' in ema calculation.

Only tested for JEPA without FSDP, not tested in any other contexts.

Description

See above.

Issue Number

Closes #2601

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Checklist before asking for review

• I have performed a self-review of my code
• [ x My changes comply with basic sanity checks:
  • I have fixed formatting issues with ./scripts/actions.sh lint
  • I have run unit tests with ./scripts/actions.sh unit-test
  • I have documented my code and I have updated the docstrings.
  • I have added unit tests, if relevant
• I have tried my changes with data and code:
  • I have run the integration tests with ./scripts/actions.sh integration-test
  • (bigger changes) I have run a full training and I have written in the comment the run_id(s): launch-slurm.py --time 60
  • (bigger changes and experiments) I have shared a hegdedoc in the github issue with all the configurations and runs for this experiments
• I have informed and aligned with people impacted by my change:
  • for config changes: the MatterMost channels and/or a design doc
  • for changes of dependencies: the MatterMost software development channel