Bugfix for `model2netcdf.ED2()`—missing PFTs cause incorrect dimensions

[Aariq]

Description

Fixes a bug in model2netcdf.ED2() where put_E_values() would fail because the dimensions were wrong when a PFT was missing from ED2 output .h5 files.

Motivation and Context

I was previously making the assumption that all PFTs would show up in all outputs, but apparently they can "disappear" for a few months and then come back. This may be an ED2 bug, but for now, I figured it would be best to write NAs for temporarily missing PFTs so that the dimensions get figured out correctly and .nc files get created.

Review Time Estimate

• [x] Immediately
• [ ] Within one week
• [ ] When possible

Types of changes

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• [ ] My change requires a change to the documentation.
• [x] My name is in the list of CITATION.cff
• [x] I have updated the CHANGELOG.md.
• [ ] I have updated the documentation accordingly.
• [x] I have read the CONTRIBUTING document.
• [ ] I have added tests to cover my changes.
• [ ] All new and existing tests passed.