Fix bug cannot mount xfs PV

Add the xfsprogs back to longhorn-manger image so that
longhorn-csi-plugin can run mkfs.xfs to mount the xfs PV

longhorn-7140

Signed-off-by: Phan Le <phan.le@suse.com>

package/Dockerfile

@@ -1,6 +1,6 @@
 FROM registry.suse.com/bci/bci-base:15.5
 
-RUN zypper -n install iputils iproute2 nfs-client cifs-utils bind-utils e2fsprogs && \
+RUN zypper -n install iputils iproute2 nfs-client cifs-utils bind-utils e2fsprogs xfsprogs && \
     rm -rf /var/cache/zypp/*
 
 COPY bin package/launch-manager package/nsmounter /usr/local/sbin/