chore(sync): remove heavy clones

[rymnc]

Linked Issues/PRs

• https://github.com/FuelLabs/fuel-core/issues/2461

Description

wraps the cached data within an arc for cheaper clones. we have to measure the performance difference. perhaps on devnet

Before requesting review

• [x] I have reviewed the code myself

After merging, notify other teams

[Add or remove entries as needed]

• [ ] Rust SDK
• [ ] Sway compiler
• [ ] Platform documentation (for out-of-organization contributors, the person merging the PR will do this)
• [ ] Someone else?