sharing: Update functional test to use syncthing-access group
The 'syncthing' group name was replaced by 'syncthing-access' in MR !1995 (closed), update the sharing app functional test to use this new group name.
Test:
- Update the sharing app Apache2 configuration. Run the sharing app tests. All tests pass.
Signed-off-by: Veiko Aasa veiko17@disroot.org