✨ feat(tests): Disallow empty change set for storage slot

[raxhvl]

🗒️ Description

Adds a test to ensure clients reject storage slots with empty changes

• All: Ran fast static checks to avoid unnecessary CI fails, see also Code Standards and Enabling Pre-commit Checks:

  just static

• All: PR title adheres to the repo standard - it will be used as the squash commit message and should start type(scope):.
• All: Considered updating the online docs in the ./docs/ directory.
• All: Set appropriate labels for the changes (only maintainers can apply labels).

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.49%. Comparing base (810c184) to head (e2f5a54).
⚠️ Report is 13 commits behind head on forks/amsterdam.

Additional details and impacted files

@@                 Coverage Diff                 @@
##           forks/amsterdam    #2945      +/-   ##
===================================================
+ Coverage            90.44%   90.49%   +0.05%     
===================================================
  Files                  535      535              
  Lines                32439    32430       -9     
  Branches              3012     3012              
===================================================
+ Hits                 29338    29349      +11     
+ Misses                2573     2563      -10     
+ Partials               528      518      -10     

Flag	Coverage Δ
unittests	90.49% <ø> (+0.05%)	⬆️

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