chore(gas_price_service): use port for GasPriceSettings instead of concrete type

[rymnc]

[!NOTE] This is PR 4/n in cleaning up the gas price service. Please review https://github.com/FuelLabs/fuel-core/pull/2230 before getting to this one ;)

Linked Issues/PRs

• https://github.com/FuelLabs/fuel-core/pull/2230

Description

Used the existing port for GasPriceSettingsProvider and made the algorithm updater generic over it. the algorithm_updater can be moved to the fuel-core-gas-price-service crate after this.

Checklist

• [x] Breaking changes are clearly marked as such in the PR description and changelog
• [x] New behavior is reflected in tests
• [x] The specification matches the implemented behavior (link update PR if changes are needed)

Before requesting review

• [x] I have reviewed the code myself
• [ ] I have created follow-up issues caused by this PR and linked them here

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?

[rymnc]

already merged into master