Support new encode/decode for `__log` about fuels-ts

[danielbate]

Full details for the changes can be found here, however here are the high level changes that we should make for the SDK.

• Types now only use the exact number of bits that they need. For example, bool and u8 now only take up a single byte.
• No additional padding or alignment, as seen in #1435.
• Arrays, Tuples and fixed size String Arrays are encoded without any additional padding, and take up the size of it’s contents. A dynamic sized string will have a u64 length at the start.
• Vec, Byte and Raw Slice are also encoded like a dynamic array, with a u64 length and then it's contents.
• We should also look to handle versioning within our encoding services. Encoding is subject to change so we should support different coders.