Handle Out of Bounds Read In Input Message Data

[bitzoic]

Description

Previously, when the offset in input_message_data() was not zero, an out of bound read would occur as the offset was not subtracted from the length to read. This has been added. A check to ensure that the offset does not exceed the length has also been added.

Checklist

• I have linked to any relevant issues.
• I have commented my code, particularly in hard-to-understand areas.
• I have updated the documentation where relevant (API docs, the reference, and the Sway book).
  • If my change requires substantial documentation changes, I have requested support from the DevRel team
• I have added tests that prove my fix is effective or that my feature works.
• I have added (or requested a maintainer to add) the necessary Breaking* or New Feature labels where relevant.
• I have done my best to ensure that my PR adheres to the Fuel Labs Code Review Standards.
• I have requested a review from the relevant team or maintainers.

[K1-R1]

Looks good, left a gas golf suggestion for your consideration. Then happy to approve