nfsd: fix Ansible conditional for fsprogs package

Fix Ansible conditional that was checking a string variable as a boolean.
Modern Ansible requires explicit boolean checks, so change:
  - fsprogs
to:
  - fsprogs  < /dev/null |  length > 0

This resolves the error:
"Conditional result was 'btrfs-progs' of type 'str', which evaluates
to True. Conditionals must have a boolean result."

Generated-by: Claude AI

Signed-off-by: Daniel Gomez <da.gomez@samsung.com>

Author: dagomez137

playbooks/roles/nfsd/tasks/install-deps/debian/main.yml

@@ -19,7 +19,7 @@
     nfsd_packages: "{{ nfsd_packages + [fsprogs] }}"
   when:
     - fsprogs is defined
-    - fsprogs
+    - fsprogs | length > 0
 
 - name: Add gssproxy to the nfsd packages list
   set_fact: