Support `Upload` and `Upgrade` transactions

[xgreenx]

The change just adda basic support for Upload and Upgrade transactions. It already allows re-usage of all estimation and sending logic which is used in the https://github.com/FuelLabs/fuel-utils.

Checklist

• [ ] I have linked to any relevant issues.
• [ ] I have updated the documentation.
• [ ] I have added tests that prove my fix is effective or that my feature works.
• [ ] I have added necessary labels.
• [x] I have done my best to ensure that my PR adheres to the Fuel Labs Code Review Standards.
• [x] I have requested a review from the relevant team or maintainers.

[xgreenx]

@segfault-magnet May I ask you to make this PR fulfill your standards of the codebase, please?=)

The example of how I used Upload and Upgrade transactions you can find in this repository.

[segfault-magnet]

@segfault-magnet May I ask you to make this PR fulfill your standards of the codebase, please?=)

The example of how I used Upload and Upgrade transactions you can find in this repository.

Sure. Tnx for the PR and the examples, I'll finish it up.