Update tables to ElectrodesTable/FrequencyBandsTable earlier

[rly]

Motivation

Fix hdmf-dev/hdmf-zarr#281

How to test the behavior?

I added a backwards compatibility test with an NWB file written with PyNWB 3.0.0 with a Units table that points to the (old) electrodes table and an ElectricalSeries that points to the (old) electrodes table

Checklist

• Did you update CHANGELOG.md with your changes?
• Have you checked our Contributing document?
• Have you ensured the PR clearly describes the problem and the solution?
• Is your contribution compliant with our coding style? This can be checked running ruff check . && codespell from the source directory.
• Have you checked to ensure that there aren't other open Pull Requests for the same change?
• Have you included the relevant issue number using "Fix #XXX" notation where XXX is the issue number? By including "Fix #XXX" you allow GitHub to close issue #XXX when the PR is merged.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.31%. Comparing base (e1d0612) to head (1916d9f).
⚠️ Report is 14 commits behind head on dev.

Additional details and impacted files

@@            Coverage Diff             @@
##              dev    #2112      +/-   ##
==========================================
+ Coverage   95.21%   95.31%   +0.10%     
==========================================
  Files          28       28              
  Lines        2840     2837       -3     
  Branches      729      730       +1     
==========================================
  Hits         2704     2704              
+ Misses         80       77       -3     
  Partials       56       56              

Flag	Coverage Δ
integration	74.40% <100.00%> (+0.07%)	⬆️
unit	85.26% <73.91%> (+0.19%)	⬆️

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