chore: add missing builder functions

[mattsse]

🤖 Generated by Copilot at 8c7ebd8

Add methods to configure reputation and backoff for peers. This is part of a refactor to make the PeerManagerConfig struct more flexible and customizable.

[codecov]

Codecov Report

Merging #4770 (0757513) into main (0f9def0) will decrease coverage by 0.15%.
Report is 5 commits behind head on main.
The diff coverage is 85.71%.

Files	Coverage Δ
crates/net/network/src/peers/manager.rs	83.40% <85.71%> (-0.85%)	⬇️

... and 80 files with indirect coverage changes

Flag	Coverage Δ
integration-tests	16.50% <42.85%> (-0.05%)	⬇️
unit-tests	63.38% <85.71%> (-0.14%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Components	Coverage Δ
reth binary	32.07% <ø> (-0.04%)	⬇️
blockchain tree	83.69% <ø> (-0.05%)	⬇️
pipeline	88.53% <ø> (ø)
storage (db)	73.49% <ø> (-0.22%)	⬇️
trie	94.48% <ø> (-0.29%)	⬇️
txpool	49.51% <ø> (-0.48%)	⬇️
networking	76.82% <85.71%> (-0.30%)	⬇️
rpc	57.67% <ø> (-0.02%)	⬇️
consensus	62.84% <ø> (-0.26%)	⬇️
revm	28.33% <ø> (ø)
payload builder	8.20% <ø> (-0.12%)	⬇️
primitives	86.52% <ø> (-0.04%)	⬇️

[Rjected]

LGTM