chore: rename roles to reflect upstream naming scheme

roles/server/templates/nextcloud-group.j2

@@ -0,0 +1,48 @@
+root:x:0:root
+bin:x:1:root,bin,daemon
+daemon:x:2:root,bin,daemon
+sys:x:3:root,bin,adm
+adm:x:4:root,adm,daemon
+tty:x:5:
+disk:x:6:root,adm
+lp:x:7:lp
+mem:x:8:
+kmem:x:9:
+wheel:x:10:root
+floppy:x:11:root
+mail:x:12:mail
+news:x:13:news
+uucp:x:14:uucp
+man:x:15:man
+cron:x:16:cron
+console:x:17:
+audio:x:18:
+cdrom:x:19:
+dialout:x:20:root
+ftp:x:21:
+sshd:x:22:
+input:x:23:
+at:x:25:at
+tape:x:26:root
+video:x:27:root
+netdev:x:28:
+readproc:x:30:
+squid:x:31:squid
+xfs:x:33:xfs
+kvm:x:34:kvm
+games:x:35:
+shadow:x:42:
+cdrw:x:80:
+www-data:x:{{ nextcloud_user_info.group }}:www-data
+usb:x:85:
+vpopmail:x:89:
+users:x:100:games
+ntp:x:123:
+nofiles:x:200:
+smmsp:x:209:smmsp
+locate:x:245:
+abuild:x:300:
+utmp:x:406:utmp
+ping:x:999:
+nogroup:x:65533:
+nobody:x:65534: