mariadb: build without tests to save space

This saves 380MB, by removing:
- bin/mysql_client_test (and the bin/mariadb-client-test symlink)
- mysql-test/

component/mariadb/buildout.cfg

@@ -35,9 +35,10 @@ shared = true
 url = https://archive.mariadb.org//mariadb-${:version}/source/mariadb-${:version}.tar.gz
 pcre-location = ${pcre2:location}
 pre-configure =
-  set '\bSET(PLUGIN_AUTH_PAM YES CACHE BOOL "")' cmake/build_configurations/mysql_release.cmake
-  grep -q "$@"
-  sed -i "/$1/d" "$2"
+  d() { grep -q "$@"; sed -i "/$1/d" "$2"; }
+  d '\bSET(PLUGIN_AUTH_PAM YES CACHE BOOL "")' cmake/build_configurations/mysql_release.cmake
+  d 'ADD_SUBDIRECTORY(\(mysql-test\|tests\)\b' CMakeLists.txt
+  d '\bINSTALL_MYSQL_TEST\b' cmake/plugin.cmake
 configure-command = ${cmake:location}/bin/cmake
 configure-options =
   -DCMAKE_INSTALL_PREFIX=@@LOCATION@@