Support payment from PDA accounts

[febo]

Currently, the royalty payment only support payer_address that is a wallet (SystemProgram owned accounts). There are scenarios where the funds are in escrow PDA accounts. Trying to make the payment from these accounts will failed since they are not owned by SystemProgram and therefore cannot be used in system_instruction::transfer.

https://github.com/wen-community/wen-new-standard/blob/7468d3fe711ba7b4aa9b4ea6f9c0f8bf0ad8211c/programs/wen-royalty-distribution/src/instructions/update.rs#L123

[balmy-gazebo]

There's no clean way to do this without switching to SPL transfers only. Open to ideas. Alternatively, transferring funds from PDA to Signer earlier in the transaction may work.

[mons2024]

Yes