Improve Predicate Vector input support

[camsjams]

Motivation

Vector code works partially with Predicates. The vectors can be encoded and sent to the the Sway programs well part of the time, but there is an offset issue that occurs occasionally when trying to send the payloads.

See #1046

Usage example

The offset here isn't calculating properly, see the 17: https://github.com/FuelLabs/fuels-ts/blob/master/packages/predicate/src/predicate.ts#L117-L122

Possible implementations

Start with running these skipped tests:

• https://github.com/FuelLabs/fuels-ts/blob/master/packages/fuel-gauge/src/vector-types.test.ts#L134 (see its sway file: https://github.com/FuelLabs/fuels-ts/blob/master/packages/fuel-gauge/fixtures/forc-projects/predicate-vector-types/src/main.sw)
• And https://github.com/FuelLabs/fuels-ts/blob/master/packages/fuel-gauge/src/predicate/predicate-arguments.test.ts#L335

[arboleya]

The action here is unclear; this issue could use a better description to communicate what needs to be done.

[camsjams]

The action here is unclear; this issue could use a better description to communicate what needs to be done.

@arboleya @danielbate I've updated the description