[d-v-b]

Summary

adds tzdata to the docker image used for the big-endian tests, which zarr needs and debian sid doesn't provide.

closes #4562

For reviewers

[What would you most value a second look at? What are you already confident in? For a refactor, say whether behavior is meant to be unchanged.]

Author attestation

• I am a human, these are my changes, and I have reviewed and understood every change and can explain why each is correct.

TODO

• Add unit tests and/or doctests in docstrings
• Add docstrings and API docs for any new/modified user-facing classes and functions
• New/modified features documented in docs/user-guide/*.md
• Changes documented as a new file in changes/
• GitHub Actions have all passed
• Test coverage is 100% (Codecov passes)

[d-v-b]

self-merging when tests pass

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.73%. Comparing base (9b7b93b) to head (024f2e9).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #4570   +/-   ##
=======================================
  Coverage   94.73%   94.73%           
=======================================
  Files          94       94           
  Lines       13706    13706           
=======================================
  Hits        12985    12985           
  Misses        721      721           

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