lang: the Err-variant returned from this function is very large

[wjthieme]

Clippy added a new rule in 1.65.0 related to the size or Err variant on Result. This is rule fails for anchor_lang::error::Error which makes anchor_lang::prelude::Result fail Clippy checks.

41 |     pub fn transfer_hook(ctx: Context<Transfer>, amount: u64) -> Result<()> {
   |                                                                  ^^^^^^^^^^ the `Err`-variant is at least 160 bytes
   |
   = help: try reducing the size of `anchor_lang::error::Error`, for example by boxing large elements or replacing it with `Box<anchor_lang::error::Error>`
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#result_large_err

env

rustc 1.71.0 (8ede3aae2 2023-07-12)
solana-cli 1.14.24 (src:605da4a3; feat:1879391783)
anchor-cli 0.28.0

deps

anchor-lang = { version = "^0.28.0", features = ["init-if-needed"] }
anchor-spl = { version = "^0.28.0" }