REVM: Send outbox message entrypoints for XTZ and FA fast withdrawals

What

Send outbox precompile contract can emit fast withdrawal messages for both XTZ and FA.

Why

Fast withdrawals are missing from the REVM current implementation as preliminary work for standard withdrawals had to be validated before moving forwards.

How

Use the building logic contained in the current kernel implementation + use the opportunity to factorize as it was done for standard withdrawals.