MDEV-31101 Re-enable spider/bugfix.mdev_29904

The spider init bug fixes remove any race conditions during spider
init.

Also remove the add_suppressions in spider/bugfix.mdev_27575 which is
a similar issue.

storage/spider/mysql-test/spider/bugfix/disabled.def

 wait_timeout : MDEV-26045
-mdev_29904 : MDEV-31101

storage/spider/mysql-test/spider/bugfix/r/mdev_27575.result

@@ -4,8 +4,6 @@
 for master_1
 for child2
 for child3
-call mtr.add_suppression("\\[ERROR\\] Table 'mysql.spider_table_sts' doesn't exist");
-call mtr.add_suppression("\\[ERROR\\] Server shutdown in progress");
 SET GLOBAL default_tmp_storage_engine=spider;
 # restart
 SET GLOBAL default_storage_engine=Spider;

storage/spider/mysql-test/spider/bugfix/t/mdev_27575.test

@@ -7,10 +7,6 @@
 --enable_result_log
 --enable_query_log
 
-# These suppressions are a workaround and should not be needed once
-# MDEV-29870 is done.
-call mtr.add_suppression("\\[ERROR\\] Table 'mysql.spider_table_sts' doesn't exist");
-call mtr.add_suppression("\\[ERROR\\] Server shutdown in progress");
 SET GLOBAL default_tmp_storage_engine=spider;
 --source include/restart_mysqld.inc