chore: add lints to p2p-sync

[giladchase]

Add workspace lints, which in particular ban as usage.

Changes:

1. switch as into From when applicable.
2. replace the conditional+cast with equivalent logic u64::try_from.

[reviewable-StarkWare]

This change is 

[giladchase]

Reviewable status: 0 of 2 files reviewed, all discussions resolved

---

crates/papyrus_p2p_sync/src/server/utils.rs line 14 at r1 (raw file):

        Direction::Backward => -1,
    };
    // TODO(shahak): Fix this code.

Kept this, negative block number still probably needs fixing 😅

Code quote:

    // TODO(shahak): Fix this code.

[codecov]

Codecov Report

Attention: Patch coverage is 42.85714% with 4 lines in your changes missing coverage. Please review.

Project coverage is 18.50%. Comparing base (e3165c4) to head (f9922df).
Report is 236 commits behind head on main.

Files with missing lines	Patch %	Lines
crates/papyrus_p2p_sync/src/server/utils.rs	42.85%	2 Missing and 2 partials ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #1844       +/-   ##
===========================================
- Coverage   40.10%   18.50%   -21.61%     
===========================================
  Files          26      100       +74     
  Lines        1895    12218    +10323     
  Branches     1895    12218    +10323     
===========================================
+ Hits          760     2261     +1501     
- Misses       1100     9528     +8428     
- Partials       35      429      +394     

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[dorimedini-starkware]

Reviewed 2 of 2 files at r1, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @elintul)