Bump Airdrop to forc v0.47.0

[bitzoic]

Type of change

• Improvement (refactoring, restructuring repository, cleaning tech debt, ...)

Changes

The following changes have been made:

• Removes Simple Asset in favor of using custom assets in the SDK
• Updates the airdrop contract to forc v0.47.0
• Updates the Rust SDK to fuel-rs v0.53.0

Notes

• This is currently using the transaction policies patch to work with custom assets

Related Issues

Completes Airdrop task of https://github.com/FuelLabs/sway-applications/issues/732

[bitzoic]

Closing as this is pointing to the incorrect branch. This should not be merged to master.

[bitzoic]

Closed in favor of https://github.com/FuelLabs/sway-applications/pull/760