feat!: add support for experimental encoding in logs

[hal3e]

closes: #1247, #1151, #901, #898

This PR adds support for sway's experimental encoding in logs. The new encoder is enabled with the experimental rustflag.

To run the tests, first build the forc projects with:
forc build --path packages/fuels --experimental-new-encoding then run the tests with:
RUSTFLAGS='--cfg experimental' cargo test --test logs

What was done:

• added ExperimentalBoundedDecoder
• updated how RawSlice was encoded and decoded
• added tests for the new encoding
• add new CI step that runs tests with the new experimental flag

BREAKING CHANGE:

• change RawSlice encoding and decoding

Checklist

• I have linked to any relevant issues.
• I have added tests that prove my fix is effective or that my feature works.
• I have added necessary labels.
• 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.

[MujkicA]

LGTM

[digorithm]

Excellent work -- excited to see this new ABI decoding in action 😍

Left a minor question but it shouldn't be a blocker.