mysql80: init at 8.0.17 (#65221)

MySQL 8.0 is a significant iteration after MySQL 5.7.  This patch adds it as
a parallel build alongside mysql57 (similar to mysql56 and mysql55 before).

pkgs/servers/sql/mysql/libutils.patch

@@ -0,0 +1,5 @@
+--- a/cmake/libutils.cmake
++++ b/cmake/libutils.cmake
+@@ -345 +345 @@ MACRO(MERGE_CONVENIENCE_LIBRARIES)
+-      COMMAND /usr/bin/libtool -static -o $<TARGET_FILE:${TARGET}>
++      COMMAND libtool -static -o $<TARGET_FILE:${TARGET}>