ci: Make fuse and libfuse-dev conditional for Debian Testing

ci: Make fuse and libfuse-dev conditional for Debian Testing

The libfuse-dev and fuse (FUSE 2) packages have been removed from
Debian Testing (forky/sid). Move them out of the unconditional package
list and only install them on older Debian/Ubuntu versions that still
provide FUSE 2. FUSE 3 support is already handled via the libfuse3-dev
argument logic.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Signed-off-by: Xiaofeng Wang <henrywangxf@me.com>