5611c9e42afix(file_store): rm lifetime from `FileError` (志宇) Pull request description: ### Description The lifetime on the error needed to be the same as the input magic bytes which was annoying. ### Changelog notice Fixed * Remove `bdk_file_store::FileError` lifetime. ### Checklists #### All Submissions: * [x] I've signed all my commits * [x] I followed the [contribution guidelines](https://github.com/bitcoindevkit/bdk/blob/master/CONTRIBUTING.md) * [x] I ran `cargo fmt` and `cargo clippy` before committing ACKs for top commit: LLFourn: ACK5611c9e42aTree-SHA512: 0eca5128c71c9adb10a712d169a2170b8cbb91678f93986957e86b26dbfed3ab19217a136b57328249a13a51cc06e6c424d58683d74a0fa3d29c22af04a95591