MDBF-882 - ColumnStore Package not created on SLES

This is a fix for #681

While boost components were installed on SLES, the CS package was still missing.
After doing a CMAKE --trace I've found out that limbxml2 is missing.

MESSAGE_ONCE(CS_NO_LIBXML Could not find a usable libxml2 development environment! )

Tested locally with the current sles1506 container image and after
installing libxml2-devel, the CS packages are generated for mariadb server 10.11.

ci_build_images/sles.Dockerfile

@@ -50,6 +50,7 @@ RUN zypper -n update \
     liblz4-devel \
     libopenssl-3-devel \
     liburing2-devel \
+    libxml2-devel \
     pam-devel \
     pcre2-devel \
     perl-Net-SSLeay \