test(protobuf): add auto impl for statediffchunk

[eitanm-starkware]

This change is 

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 3 lines in your changes missing coverage. Please review.

Project coverage is 68.39%. Comparing base (b9c9593) to head (b0f2ac3).
Report is 1 commits behind head on main.

Files	Patch %	Lines
crates/papyrus_protobuf/src/sync.rs	0.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2115      +/-   ##
==========================================
- Coverage   68.41%   68.39%   -0.03%     
==========================================
  Files         132      132              
  Lines       17602    17597       -5     
  Branches    17602    17597       -5     
==========================================
- Hits        12042    12035       -7     
- Misses       4226     4229       +3     
+ Partials     1334     1333       -1     

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[ShahakShama]

Reviewed 5 of 5 files at r1, all commit messages.
Reviewable status: all files reviewed, 1 unresolved discussion (waiting on @eitanm-starkware)

---

crates/papyrus_protobuf/src/sync.rs line 80 at r1 (raw file):

    DeclaredClass(DeclaredClass),
    DeprecatedDeclaredClass(DeprecatedDeclaredClass),
}

newline between each block

[ShahakShama]

Reviewed 1 of 1 files at r2, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @eitanm-starkware)

[ShahakShama]

Reviewed 2 of 2 files at r3, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @eitanm-starkware)