Spider: no need to check for ubsan when running ubsan tests

It's ok to run these tests without ubsan too, and we get some tests
for free.

storage/spider/mysql-test/spider/bugfix/r/mdev_26541.result

@@ -2,18 +2,3 @@
 # MDEV-26541 Undefined symbol: _ZTI12ha_partition when attempting to use ha_spider.so in UBSAN builds
 #
 INSTALL SONAME 'ha_spider.so';
-DROP FUNCTION spider_flush_table_mon_cache;
-DROP FUNCTION spider_copy_tables;
-DROP FUNCTION spider_ping_table;
-DROP FUNCTION spider_bg_direct_sql;
-DROP FUNCTION spider_direct_sql;
-UNINSTALL SONAME IF EXISTS "ha_spider";
-DROP TABLE IF EXISTS mysql.spider_xa;
-DROP TABLE IF EXISTS mysql.spider_xa_member;
-DROP TABLE IF EXISTS mysql.spider_xa_failed_log;
-DROP TABLE IF EXISTS mysql.spider_tables;
-DROP TABLE IF EXISTS mysql.spider_link_mon_servers;
-DROP TABLE IF EXISTS mysql.spider_link_failed_log;
-DROP TABLE IF EXISTS mysql.spider_table_position_for_recovery;
-DROP TABLE IF EXISTS mysql.spider_table_sts;
-DROP TABLE IF EXISTS mysql.spider_table_crd;

storage/spider/mysql-test/spider/bugfix/t/mdev_26541.test

@@ -2,10 +2,7 @@
 --echo # MDEV-26541 Undefined symbol: _ZTI12ha_partition when attempting to use ha_spider.so in UBSAN builds
 --echo #
 
-if (`select not(count(*)) from information_schema.system_variables where variable_name='have_sanitizer' and global_value like "%UBSAN%"`)
-{
---skip test needs to be run with UBSAN
-}
+# this test should be checked with ubsan
 
 # init spider
 
@@ -20,4 +17,5 @@ while (!$PLUGIN_EXIST)
     `SELECT COUNT(*) FROM mysql.func WHERE name = '$PLUGIN_NAME'`;
 }
 
+--disable_query_log
 --source ../../include/clean_up_spider.inc

storage/spider/mysql-test/spider/bugfix/t/mdev_28998.test

@@ -2,10 +2,7 @@
 --echo # MDEV-28998 ASAN errors in spider_fields::free_conn_holder or spider_create_group_by_handler
 --echo #
 
-if (`select not(count(*)) from information_schema.system_variables where variable_name='have_sanitizer' and global_value like "%ASAN%"`)
-{
---skip test needs to be run with ASAN
-}
+# this test should be checked with ubsan
 
 --disable_query_log
 --disable_result_log

storage/spider/mysql-test/spider/bugfix/t/mdev_30981.test

@@ -2,21 +2,18 @@
 --echo # MDEV-30981 Spider UBSAN: null pointer passed as argument 2, which is declared to never be null in spider_create_trx_alter_table on ALTER
 --echo #
 
-if (`select not(count(*)) from information_schema.system_variables where variable_name='have_sanitizer' and global_value like "%UBSAN%"`)
-{
---skip test needs to be run with UBSAN
-}
- 
+# this test should be checked with ubsan
+
 --disable_query_log
 --disable_result_log
 --source ../../t/test_init.inc
 --enable_result_log
 --enable_query_log
- 
+
 CREATE TABLE t (c INT) ENGINE=Spider PARTITION BY LIST (c) (PARTITION p VALUES IN (1,2));
 ALTER TABLE t ENGINE=InnoDB;
 drop table t;
- 
+
 --disable_query_log
 --disable_result_log
 --source ../t/test_deinit.inc