MDEV-19780 Remove the TokuDB storage engine

disable tokudb, because it's being deprecated by the vendor

debian/autobake-deb.sh

@@ -106,6 +106,8 @@ then
   sed '/Package: mariadb-plugin-cassandra/,/^$/d' -i debian/control
 fi
 
+sed -i -e "/Package: mariadb-plugin-tokudb/,/^$/d" debian/control
+
 # Mroonga, TokuDB never built on Travis CI anyway, see build flags above
 if [[ $TRAVIS ]]
 then

storage/tokudb/CMakeLists.txt

@@ -38,6 +38,7 @@ SET(TOKUDB_SOURCES
     tokudb_thread.cc
     tokudb_dir_cmd.cc)
 MYSQL_ADD_PLUGIN(tokudb ${TOKUDB_SOURCES} STORAGE_ENGINE MODULE_ONLY
+                 DISABLED
                  COMPONENT tokudb-engine CONFIG ${CMAKE_CURRENT_BINARY_DIR}/tokudb.cnf)
 
 IF(NOT TARGET tokudb)