nixos/ceph: add options to configure package used by each component

This makes updates following the upstream guide possible.

nixos/modules/services/network-filesystems/ceph.nix

···
 
   makeServices = daemonType: daemonIds:
     mkMerge (map (daemonId:
-      { "ceph-${daemonType}-${daemonId}" = makeService daemonType daemonId cfg.global.clusterName pkgs.ceph; })
+      { "ceph-${daemonType}-${daemonId}" = makeService daemonType daemonId cfg.global.clusterName cfg.${daemonType}.package; })
       daemonIds);
 
   makeService = daemonType: daemonId: clusterName: ceph:
···
           to the id part in ceph i.e. [ "name1" ] would result in mgr.name1
         '';
       };
+      package = mkPackageOptionMD pkgs "ceph" { };
       extraConfig = mkOption {
         type = with types; attrsOf str;
         default = {};
···
           to the id part in ceph i.e. [ "name1" ] would result in mon.name1
         '';
       };
+      package = mkPackageOptionMD pkgs "ceph" { };
       extraConfig = mkOption {
         type = with types; attrsOf str;
         default = {};
···
           to the id part in ceph i.e. [ "name1" ] would result in osd.name1
         '';
       };
-
+      package = mkPackageOptionMD pkgs "ceph" { };
       extraConfig = mkOption {
         type = with types; attrsOf str;
         default = {
···
           to the id part in ceph i.e. [ "name1" ] would result in mds.name1
         '';
       };
+      package = mkPackageOptionMD pkgs "ceph" { };
       extraConfig = mkOption {
         type = with types; attrsOf str;
         default = {};
···
 
     rgw = {
       enable = mkEnableOption (lib.mdDoc "Ceph RadosGW daemon");
+      package = mkPackageOptionMD pkgs "ceph" { };
       daemons = mkOption {
         type = with types; listOf str;
         default = [];