Also explicitly remove SGID bit when building .deb

The presence of this bit on the files seems to have no consequence on
the final package as the installed files do not have the SGID bit set.
But for consistency with the rpm packaging, uset the bit before building
the package.

scripts/pkg/build_templates/opensearch/deb/debmake_opensearch_install.sh

@@ -41,6 +41,7 @@ ln -s ${data_dir} ${buildroot}${product_dir}/data
 ln -s ${log_dir}  ${buildroot}${product_dir}/logs
 
 # Change Permissions
+chmod -Rf g-s ${buildroot}/*
 chmod -Rf u=rwX,g=rX,o=rX ${buildroot}/*
 
 exit 0