(Do not merge): Refactor fuel-core to use version of StorageRead::read with offset

[acerone85]

Linked Issues/PRs

Related to FuelLabs/fuel-vm#681

Description

In order to load contracts from a given offset efficiently, we have changed the interface of StorageRead::read to accept a n offset in input (see FuelLabs/fuel-vm#863). This PR refactors the fuel-core repo to make use of the new StorageRead trait.

Do not merge

we should first wait for the changes to StorageRead to be released in fuel-vm, after which we can update the dependencies in this PR

Checklist

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

Before requesting review

• 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

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

[acerone85]

I find it suspicious that I never had to hardcode the offset value to 0 in this PR. Is StorageRead::read used at all in fuel-core?