Merge tag 'tags/fuse2fs-refactor-mounting_2026-03-12' into next

fuse2fs: refactor mount code [05/18]

Here, we hoist the mounting code out of main() into a pile of separate
helper functions to reduce the complexity of understanding the mount
code.  This isn't strictly required for iomap, but it makes main() a lot
easier to understand.

Signed-off-by: "Darrick J. Wong" <djwong@kernel.org>