Add the possibility to specify an offset for the read value in StorageRead::read

[acerone85]

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[Short description of the changes.]

Checklist

• [ ] Breaking changes are clearly marked as such in the PR description and changelog
• [ ] New behavior is reflected in tests
• [ ] If performance characteristic of an instruction change, update gas costs as well or make a follow-up PR for that
• [ ] 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]

LGTM!=) Do I understand correct, that after this change is merged, you will rework #847 ?

Yes, I'll start working on that shortly. IIUC After the release of the next fuel-vm version I'll also have to update fuel-core to use the new storage?

[xgreenx]

After the release of the next fuel-vm version I'll also have to update fuel-core to use the new storage?

Yes