Upgrade fuser to 0.17.0

[citizen-stig]

Summary

This PR upgrades fuser from 0.15.1 to 0.17.0 and ports trickfs to the newer API. The goal is to split out the fuser work as a standalone change and remove the old fuser audit finding from the dependency graph without mixing in the unrelated dependency upgrades.

What changed

• Upgraded the workspace fuser dependency to 0.17.0.
• Updated trickfs to the fuser 0.17 API:
  • switched from the old u64/raw flag interfaces to typed wrappers like INodeNo, FileHandle, Generation, OpenFlags, WriteFlags, and typed Errno
  • adapted reply paths such as entry, created, opened, and readdir
  • moved mutable filesystem state behind Mutex because fuser::Filesystem now operates through &self and requires Send + Sync
• Removed AutoUnmount from trickfs mount configs.
  • fuser 0.17 now requires a broader ACL when AutoUnmount is enabled
  • instead, teardown is now explicit via umount_and_join()
• Updated trickmnt to explicitly unmount on exit instead of relying on handle drop behavior.
• Refreshed Cargo.lock only as needed for the fuser upgrade and its transitive dependencies.

Why

cargo audit reports RUSTSEC-2021-0154 for fuser 0.15.1