chore(batcher): remove block metadata member from block builder factory

[ArniStarkware]

Refactor towards getting block info from consensus.

[reviewable-StarkWare]

This change is 

[ArniStarkware]

• chore(batcher): add next_block_info method to block builder factory #2231
• chore(batcher): remove block metadata member from block builder factory #2230 👈 (View in Graphite)
• main

This stack of pull requests is managed by Graphite. Learn more about stacking.

[codecov]

Codecov Report

Attention: Patch coverage is 30.76923% with 9 lines in your changes missing coverage. Please review.

Project coverage is 5.18%. Comparing base (e3165c4) to head (e221112).
Report is 551 commits behind head on main.

Files with missing lines	Patch %	Lines
crates/starknet_batcher/src/block_builder.rs	0.00%	9 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #2230       +/-   ##
==========================================
- Coverage   40.10%   5.18%   -34.93%     
==========================================
  Files          26     146      +120     
  Lines        1895   16974    +15079     
  Branches     1895   16974    +15079     
==========================================
+ Hits          760     880      +120     
- Misses       1100   16020    +14920     
- Partials       35      74       +39     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

---

🚨 Try these New Features:

• Flaky Tests Detection - Detect and resolve failed and flaky tests
• JS Bundle Analysis - Avoid shipping oversized bundles